Quizbank/College Physics Sem 1/Questions list

This table shows which questions are on each test. N_Total is the total number of questions from which the tests are created. If that number is excessive and the questions are repetitive, then, a smaller number N_Print<N_Total will intead be printed here.

questions	Total	Print	T1	T2	T3	T4	FE	permalink	quiz
1−4	4	4	2				0	Special:Permalink/1828918	QB/a02_1Dkinem_definitions
5−8	4	4	3				1	Special:Permalink/1863423	QB/a02_1Dkinem_equations
9−20	12	12	5				1	Special:Permalink/1863384	QB/b_motionSimpleArithmetic
21−24	4	4	3				1	Special:Permalink/1863096	QB/a03_2Dkinem_2dmotion
25−28	4	4	2				0	Special:Permalink/1863115	QB/a03_2Dkinem_smithtrain
29−47	19	19		7			1	Special:Permalink/1863392	QB/b_velocityAcceleration
48−51	4	4		1			1	Special:Permalink/1863116	QB/a04DynForce Newton_forces
52−55	4	4		2			1	Special:Permalink/1863117	QB/a04DynForce Newton_sled
56−60	5	5		2			1	Special:Permalink/1863118	QB/a04DynForce Newton_tensions
61−65	5	5		1			0	Special:Permalink/1863119	QB/a05frictDragElast_3rdLaw
66−70	5	5		2			0	Special:Permalink/1863120	QB/a06uniformCircMotGravitation_friction
71−84	14	14			2		0	Special:Permalink/1828920	QB/a06uniformCircMotGravitation_proof
85−87	3	3			1		0	Special:Permalink/1828921	QB/a07energy_cart1
88−90	3	3			2		1	Special:Permalink/1863130	QB/a07energy_cart2
91−93	3	3			2		1	Special:Permalink/1863132	QB/a08linearMomentumCollisions
94−98	5	5			3		1	Special:Permalink/1863453	QB/a09staticsTorques_torque
99−102	4	4				2	1	Special:Permalink/1863455	QB/a10rotationalMotionAngMom_dynamics
103−106	4	4				2	1	Special:Permalink/1863294	QB/a11fluidStatics_buoyantForce
107−110	4	4				1	1	Special:Permalink/1863299	QB/a12fluidDynamics_pipeDiameter
111−113	3	3				1	1	Special:Permalink/1863303	QB/a13TemperatureKineticTheoGasLaw_rmsTransfer
114−117	4	4				2	1	Special:Permalink/1863314	QB/a14HeatTransfer_specifHeatConduct
118−121	4	4				2	1	Special:Permalink/1863334	QB/a15Thermodynamics_heatEngine

Questions

Taken from College Physics Sem 1153514416667

1) A car traveling at 33.5 miles/hour stops in 7.9 seconds. What is the average acceleration?

a) 3.37 x 10^-1 m/s²

b) 5.99 x 10^-1 m/s²

c) 1.07 x 10⁰ m/s²

d) 1.9 x 10⁰ m/s²

e) 3.37 x 10⁰ m/s²

2) A car completes a complete circle of radius 2.9 miles at a speed of 42.2 miles per hour. How many minutes does it take?

a) 2.59 x 10¹ minutes

b) 3.45 x 10¹ minutes

c) 4.61 x 10¹ minutes

d) 6.14 x 10¹ minutes

e) 8.19 x 10¹ minutes

3) A car traveling at 33.8 mph increases its speed to 38.3 mph in 6.7seconds. What is the average acceleration?

a) 9.49 x 10^-2 m/s²

b) 1.69 x 10^-1 m/s²

c) 3 x 10^-1 m/s²

d) 5.34 x 10^-1 m/s²

e) 9.49 x 10^-1 m/s²

4) Mr. Smith is backing his car at a speed of 2.42 mph when he hits a cornfield (seed corn). In the course of 2.35 seconds he stops, puts his car in forward drive, and exits the field at a speed of 6.1 mph. What was the magnitude ( absolute value) of his acceleration?

a) 2.29 x 10⁰ miles per hour per second

b) 2.88 x 10⁰ miles per hour per second

c) 3.63 x 10⁰ miles per hour per second

d) 4.56 x 10⁰ miles per hour per second

e) 5.75 x 10⁰ miles per hour per second

5) A car is accelerating uniformly at an acceleration of 3.75m/s/s. At x = 5.25m, the speed is 3.55m/s. How fast is it moving at x = 11.5 m?

a) 3.72 m/s.

b) 4.46 m/s.

c) 5.36 m/s.

d) 6.43 m/s.

e) 7.71 m/s.

6) What is the acceleration if a car travelling at 9.95 m/s makes a skid mark that is 7.5 m long before coming to rest? (Assume uniform acceleration.)

a) 5.5m/s².

b) 6.6m/s².

c) 7.92m/s².

d) 9.5m/s².

e) 11.41m/s².

7) A train accelerates uniformly from 14.25 m/s to 29.625 m/s, while travelling a distance of 490 m. What is the 'average' acceleration?

a) 0.48m/s/s.

b) 0.57m/s/s.

c) 0.69m/s/s.

d) 0.83m/s/s.

e) 0.99m/s/s.

8) A particle accelerates uniformly at 16.75 m/s/s. How long does it take for the velocity to increase from 957 m/s to 1935 m/s?

a) 33.79 s

b) 40.55 s

c) 48.66 s

d) 58.39 s

e) 70.07 s

9) Mr. Smith starts from rest and accelerates to 4 m/s in 3 seconds. How far did he travel?

a) 3.0 meters

b) 4.0 meters

c) 5.0 meters

d) 6.0 meters

e) 7.0 meters

10) Mr. Smith starts from rest and accelerates to 4 m/s in 5 seconds. How far did he travel?

a) 7.0 meters

b) 8.0 meters

c) 9.0 meters

d) 10.0 meters

e) 11.0 meters

11) Mr. Smith is driving at a speed of 7 m/s, when he slows down to a speed of 5 m/s, when he hits a wall at this speed, after travelling for 2 seconds. How far did he travel?

a) 8.0 meters

b) 9.0 meters

c) 10.0 meters

d) 11.0 meters

e) 12.0 meters

12) Mr. Smith starts at rest and accelerates to a speed of 2 m/s, in 2 seconds. He then travels at this speed for an additional 1 seconds. Then he decelerates uniformly, taking 2 seconds to come to rest. How far did he travel?

a) 5.0 meters

b) 6.0 meters

c) 7.0 meters

d) 8.0 meters

e) 9.0 meters

13) Mr. Smith is driving at a speed of 4 m/s, when he slows down to a speed of 1 m/s, when he hits a wall at this speed, after travelling for 4 seconds. How far did he travel?

a) 7.0 meters

b) 8.0 meters

c) 9.0 meters

d) 10.0 meters

e) 11.0 meters

14) Mr. Smith starts at rest and accelerates to a speed of 4 m/s, in 2 seconds. He then travels at this speed for an additional 3 seconds. Then he decelerates uniformly, taking 2 seconds to come to rest. How far did he travel?

a) 19.0 meters

b) 20.0 meters

c) 21.0 meters

d) 22.0 meters

e) 23.0 meters

15) Mr. Smith starts from rest and accelerates to 2 m/s in 3 seconds. How far did he travel?

a) 3.0 meters

b) 4.0 meters

c) 5.0 meters

d) 6.0 meters

e) 7.0 meters

16) Mr. Smith is driving at a speed of 5 m/s, when he slows down to a speed of 4 m/s, when he hits a wall at this speed, after travelling for 2 seconds. How far did he travel?

a) 8.0 meters

b) 9.0 meters

c) 10.0 meters

d) 11.0 meters

e) 12.0 meters

17) Mr. Smith starts at rest and accelerates to a speed of 2 m/s, in 6 seconds. He then travels at this speed for an additional 3 seconds. Then he decelerates uniformly, taking 4 seconds to come to rest. How far did he travel?

a) 16.0 meters

b) 17.0 meters

c) 18.0 meters

d) 19.0 meters

e) 20.0 meters

18) Mr. Smith starts from rest and accelerates to 3 m/s in 2 seconds. How far did he travel?

a) 1.0 meters

b) 2.0 meters

c) 3.0 meters

d) 4.0 meters

e) 5.0 meters

19) Mr. Smith is driving at a speed of 7 m/s, when he slows down to a speed of 5 m/s, when he hits a wall at this speed, after travelling for 4 seconds. How far did he travel?

a) 23.0 meters

b) 24.0 meters

c) 25.0 meters

d) 26.0 meters

e) 27.0 meters

20) Mr. Smith starts at rest and accelerates to a speed of 2 m/s, in 6 seconds. He then travels at this speed for an additional 3 seconds. Then he decelerates uniformly, taking 4 seconds to come to rest. How far did he travel?

a) 13.0 meters

b) 14.0 meters

c) 15.0 meters

d) 16.0 meters

e) 17.0 meters

21) A ball is kicked horizontally from a height of 2.7 m, at a speed of 7.5m/s. How far does it travel before landing?

a) 3.22 m.

b) 3.87 m.

c) 4.64 m.

d) 5.57 m.

e) 6.68 m.

22) A particle is initially at the origin and moving in the x direction at a speed of 4.3 m/s. It has an constant acceleration of 2.2 m/s² in the y direction, as well as an acceleration of 0.3 in the x direction. What angle does the velocity make with the x axis at time t = 2.8 s?

a) 37.93 degrees.

b) 43.62 degrees.

c) 50.16 degrees.

d) 57.68 degrees.

e) 66.33 degrees.

23) At time, t=0, two particles are on the x axis. Particle A is (initially) at the origin and moves at a constant speed of 5.42 m/s at an angle of θ above the x-axis. Particle B is initially situated at x= 2.89 m, and moves at a constant speed of 2.26 m/s in the +y direction. At what time do they meet?

a) 0.49 s.

b) 0.59 s.

c) 0.7 s.

d) 0.84 s.

e) 1.01 s.

24) At time, t=0, two particles are on the x axis. Particle A is (initially) at the origin and moves at a constant speed of 5.15 m/s at an angle of θ above the x-axis. Particle B is initially situated at x= 2.05 m, and moves at a constant speed of 2.94 m/s in the +y direction. What is the value of θ (in radians)?

a) 0.46 radians.

b) 0.53 radians.

c) 0.61 radians.

d) 0.7 radians.

e) 0.8 radians.

25) The Smith family is having fun on a high speed train travelling at 48.8 m/s. Mr. Smith is at the back of the train and fires a pellet gun with a muzzle speed of 25.7 m/s at Mrs. Smith who is at the front of the train. What is the speed of the bullet with respect to Earth?

a) 22.1 m/s.

b) 33.1 m/s.

c) 49.7 m/s.

d) 74.5 m/s.

e) 111.8 m/s.

26) The Smith family is having fun on a high speed train travelling at 48.8 m/s. Mrs. Smith, who is at the front of the train, fires straight towards the back with a bullet that is going forward with respect to Earth at a speed of 20.2 m/s. What was the muzzle speed of her bullet?

a) 8.5 m/s.

b) 12.7 m/s.

c) 19.1 m/s.

d) 28.6 m/s.

e) 42.9 m/s.

27) The Smith family is having fun on a high speed train travelling at 48.8 m/s. The daugher fires at Mr. Smith with a pellet gun whose muzzle speed is 21.6 m/s. She was situated across the isle, perpendicular to the length of the train. What is the speed of her bullet with respect to Earth?

a) 15.8 m/s.

b) 23.7 m/s.

c) 35.6 m/s.

d) 53.4 m/s.

e) 80 m/s.

28) The Smith family got in trouble for having fun on a high speed train travelling at 48.8 m/s. Mr. Smith is charged with having fired a pellet gun at his daughter (directly across the isle) with a bullet that had a speed of 92.5 m/s with respect to Earth. How fast was the bullet going relative to the daughter (i.e. train)?

a) 45.5 m/s.

b) 54.6 m/s.

c) 65.5 m/s.

d) 78.6 m/s.

e) 94.3 m/s.

29) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is more slippery when it is pulled quickly

b) the cloth is accelerating for such a brief time that there is little motion

c) objects don't begin to accelerate until after the force has been applied

30) If you toss a coin into the air, the acceleration while it as its highest point is

a) up

b) down

c) zero

31) If you toss a coin into the air, the velocity on the way up is

a) zero

b) down

c) up

32) If you toss a coin into the air, the velocity on the way down is

a) down

b) zero

c) up

33) If you toss a coin into the air, the velocity while it as its highest point is

a) up

b) zero

c) down

34) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) northwest

b) south

c) southwest

d) north

e) northeast

35) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) southwest

b) south

c) northwest

d) north

e) northeast

36) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) northeast

b) southeast

c) northeast

d) northwest

e) north

37) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) north

b) northwest

c) south

d) northeast

e) southwest

38) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) west

b) northwest

c) southwest

d) southeast

e) south

39) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northwest

b) north

c) south

d) northeast

e) southeast

40) A car is traveling west and slowing down. The acceleration is

a) zero

b) to the east

c) to the west

41) A car is traveling east and slowing down. The acceleration is

a) zero

b) to the east

c) to the west

42) A car is traveling east and speeding up. The acceleration is

a) to the east

b) to the west

c) zero

43) If you toss a coin into the air, the acceleration on the way up is

a) down

b) zero

c) up

44) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) west

b) zero

c) south

d) north

e) east

45) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

a) east

b) south

c) north

d) zero

e) west

46) As the Moon circles Earth, the acceleration of the Moon is

a) away from Earth

b) towards Earth

c) opposite the direction of the Moon's velocity

d) in the same direction as the Moon's velocity

e) zero

47) If you toss a coin into the air, the acceleration on the way down is

a) up

b) down

c) zero

48) A mass with weight (mg) of 48 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 30 degrees. What is the tension in the string?

a) 24.8 N.

b) 28.6 N.

c) 32.9 N.

d) 37.8 N.

e) 43.5 N.

49) A mass with weight (mg) equal to 29 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 60 degrees with respect to the horizontal. What is the tension in each string?

a) 12.7 N.

b) 14.6 N.

c) 16.7 N.

d) 19.3 N.

e) 22.1 N.

50) A 2.1 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.46 . In addition to the surface friction, there is also an air drag equal to 14 N. What is the magnitude (absolute value) of the acceleration?

a) 6.4 m/s².

b) 7.3 m/s².

c) 8.4 m/s².

d) 9.7 m/s².

e) 11.2 m/s².

51) A mass with weight (mg) 5.3 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 3.05 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

a) 0.34

b) 0.4

c) 0.49

d) 0.58

e) 0.7

52) A sled of mass 5.7 kg is at rest on a rough surface. A string pulls with a tension of 41.6N at an angle of 34 degress above the horizontal. What is the magnitude of the friction?

a) 19.72 N.

b) 22.68 N.

c) 26.08 N.

d) 29.99 N.

e) 34.49 N.

53) A sled of mass 5.4 kg is at rest on a rough surface. A string pulls with a tension of 40.4N at an angle of 39 degress above the horizontal. What is the normal force?

a) 27.5 N.

b) 31.62 N.

c) 36.36 N.

d) 41.82 N.

e) 48.09 N.

54) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 44.3N at an angle of 31 degress above the horizontal. How long will it take to reach a speed of 9.2 m/s?

a) 0.91 s

b) 1.04 s

c) 1.2 s

d) 1.38 s

e) 1.59 s

55) A sled of mass 2.3 kg is on perfectly smooth surface. A string pulls with a tension of 18.3N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.8 m/s²?

a) 69.4 degrees

b) 79.8 degrees

c) 91.8 degrees

d) 105.5 degrees

e) 121.4 degrees

56)

In the figure shown, θ₁ is 18 degrees, and θ₃ is 38 degrees. The tension T₃ is 19 N. What is the tension, T₁?

a) 10.35 N.

b) 11.9 N.

c) 13.69 N.

d) 15.74 N.

e) 18.1 N.

57)

In the figure shown, θ₁ is 18 degrees, and θ₃ is 38 degrees. The tension T₃ is 19 N. What is the weight?

a) 14.4 N.

b) 16.6 N.

c) 19 N.

d) 21.9 N.

e) 25.2 N.

58)

rilght

In the figure shown, θ is 28 degrees, and the mass is 2.5 kg. What is T₂?

a) 45.38 N.

b) 52.19 N.

c) 60.01 N.

d) 69.02 N.

e) 79.37 N.

59)

rilght

In the figure shown, θ is 28 degrees, and the mass is 2.5 kg. What is T₁?

a) 32 N.

b) 38.4 N.

c) 46.1 N.

d) 55.3 N.

e) 66.4 N.

60)

In the figure shown, θ₁ is 16 degrees , and θ₃ is 30 degrees . The mass has a 'weight' of 44 N. What is the tension, T₁?

a) 34.83 N.

b) 40.05 N.

c) 46.06 N.

d) 52.97 N.

e) 60.92 N.

61)

In the figure shown, the mass of m₁ is 6.4 kg, and the mass of m₂ is 2.3 kg. If the external force, F_ext on m₂ is 174 N, what is the tension in the connecting string? Assume no friction is present.

a) 84.2 N

b) 96.8 N

c) 111.3 N

d) 128 N

e) 147.2 N

62)

In the figure shown (with m₁ = 6.4 kg, m₂ = 2.3 kg, and F_ext = 174 N), what is the acceleration? Assume no friction is present.

a) 20 m/s²

b) 23 m/s²

c) 26.5 m/s²

d) 30.4 m/s²

e) 35 m/s²

63) Nine barefoot baseball players, with a total mass of 640 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.68 . The net mass of the (shoed) basketball team is 431 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.313

b) 0.344

c) 0.378

d) 0.416

e) 0.458

64) Without their shoes, members of a 9 person baseball team have a coefficient of static friction of only 0.24 . But the team wins a game of tug of war due to their superior mass of 643 kg. They are playing against a 5 person basketball team with a net mass of 405 kg. What is the maximum coefficient of static friction of the basketball team?

a) 0.26

b) 0.286

c) 0.315

d) 0.346

e) 0.381

65)

In the figure shown, the mass of m₁ is 6.9 kg, and the mass of m₂ is 3 kg. If the external force, F_ext on m₂ is 131 N, what is the tension in the connecting string? Assume that m₁ has a kinetic coefficient of friction equal to 0.31, and that for m₂ the coefficient is 0.49 .

a) 76.2 N

b) 87.6 N

c) 100.8 N

d) 115.9 N

e) 133.3 N

66) A merry-go-round has an angular frequency, $\omega$, equal to 0.174 rad/sec. How many minutes does it take to complete 8.5 revolutions?

a) 3.87 minutes.

b) 4.45 minutes.

c) 5.12 minutes.

d) 5.88 minutes.

e) 6.77 minutes.

67) A merry-go round has a period of 0.34 minutes. What is the centripetal force on a 89.6 kg person who is standing 2.25 meters from the center?

a) 16.6 newtons.

b) 19.1 newtons.

c) 22 newtons.

d) 25.3 newtons.

e) 29.1 newtons.

68) A merry-go round has a period of 0.34 minutes. What is the minimum coefficient of static friction that would allow a 89.6 kg person to stand2.25 meters from the center, without grabbing something?

a) 0.019

b) 0.022

c) 0.025

d) 0.029

e) 0.033

69) What is the gravitational acceleration on a plant that is 2.67 times more massive than Earth, and a radius that is 1.74 times greater than Earths?

a) 5.7 m/s²

b) 6.5 m/s²

c) 7.5 m/s²

d) 8.6 m/s²

e) 9.9 m/s²

70) What is the gravitational acceleration on a plant that is 1.95 times more dense than Earth, and a radius that is 2.12 times greater than Earth's?

a) 40.5 m/s²

b) 46.6 m/s²

c) 53.6 m/s²

d) 61.6 m/s²

e) 70.9 m/s²

71)

Is $dv/d\ell =v/r$ valid for uniform circular motion?

a) Yes

b) No

72)

Is $dv/r=d\ell /v$ valid for uniform circular motion?

a) Yes

b) No

73)

Is $rd\ell =vdv$ valid for uniform circular motion?

a) Yes

b) No

74)

Is $dv=|{\vec {v}}_{2}|-|{\vec {v}}_{1}|$ valid for uniform circular motion?

a) Yes

b) No

75)

Is $d\ell /dv=v/r$ valid for uniform circular motion?

a) Yes

b) No

76)

Is $dv/d\ell =r/v$ valid for uniform circular motion?

a) Yes

b) No

77)

Is $dv=|{\vec {v}}_{2}-{\vec {v}}_{1}|$ valid for uniform circular motion?

a) Yes

b) No

78)

Is $d\ell =vdt$ valid for uniform circular motion?

a) Yes

b) No

79)

Is $adt/v=vdt/r$ valid for uniform circular motion?

a) Yes

b) No

80)

Is $dv=adt$ valid for uniform circular motion?

a) Yes

b) No

81)

Is $|d{\vec {v}}|=adt$ valid for uniform circular motion?

a) Yes

b) No

82)

Is $d\ell =|{\vec {r}}_{2}-{\vec {r}}_{1}|$ valid for uniform circular motion?

a) Yes

b) No

83)

Is $d\ell =|{\vec {r}}_{2}|-|{\vec {r}}_{1}|$ valid for uniform circular motion?

a) Yes

b) No

84)

Is $v/d\ell =r/dv$ valid for uniform circular motion?

a) Yes

b) No

85) If the initial velocity after leaving the spring is 9.60 m/s, how high does it reach before coming to rest?

a) 3.87 m

b) 4.06 m

c) 4.26 m

d) 4.48 m

e) 4.70 m

86) The mass of the cart is 2.0kg, and the spring constant is 6541N/m. If the initial compression of the spring is 2.00m, how high does it reach before coming to rest?

a) 6.67E+02 m

b) 7.01E+02 m

c) 7.36E+02 m

d) 7.73E+02 m

e) 8.11E+02 m

87) What is the highest point the cart reaches if the speed was 2.8m/s, when the cart was situated at a height of 2.3m?,

a) 2.19 m

b) 2.30 m

c) 2.42 m

d) 2.54 m

e) 2.66 m

88) The spring constant is 663N/m, and the initial compression is 0.22m. What is the mass if the cart reaches a height of 2.80m, before coming to rest?

a) 0.481 kg

b) 0.505 kg

c) 0.530 kg

d) 0.557 kg

e) 0.585 kg

89) The cart has a mass of 36.20kg. It is moving at a speed of 3.50m/s, when it is at a height of 3.70m. If the spring constant was 518N/m, what was the initial compression?

a) 2.13 m

b) 2.27 m

c) 2.43 m

d) 2.60 m

e) 2.79 m

90) You are riding a bicycle on a flat road. Assume no friction or air drag, and that you are coasting. Your speed is 4.9m/s, when you encounter a hill of height 1.14m. What is your speed at the top of the hill?

a) 1.291 m/s

b) 1.368 m/s

c) 1.450 m/s

d) 1.537 m/s

e) 1.630 m/s

91) On object of mass 3 kg that is moving at a velocity of 17m/s collides with a stationary object of mass 10.2 kg. What is the final velocity if they stick? (Assume no external friction.)

a) 2.68m/s.

b) 3.22m/s.

c) 3.86m/s.

d) 4.64m/s.

e) 5.56m/s.

92) A car of mass 634 kg is driving on an icy road at a speed of 17 m/s, when it collides with a stationary truck. After the collision they stick and move at a speed of 5.5 m/s. What was the mass of the truck?

a) 767 kg

b) 921 kg

c) 1105 kg

d) 1326 kg

e) 1591 kg

93)

A 159 gm bullet strikes a ballistic pendulum of mass 2.08 kg (before the bullet struck). After impact, the pendulum rises by 65 cm. What was the speed of the bullet?

a) 44 m/s.

b) 47 m/s.

c) 50 m/s.

d) 54 m/s.

e) 58 m/s.

94)

A massless bar of length, S = 9.3m is attached to a wall by a frictionless hinge (shown as a circle). The bar is held horizontal by a string that makes and angle θ = 28.1 degrees above the horizontal. An object of mass, M = 8.1kg is suspended at a length, L = 5.7m from the wall. What is the tension, T, in the string?

a) 8.20E+01 N

b) 1.03E+02 N

c) 1.30E+02 N

d) 1.64E+02 N

e) 2.06E+02 N

95)

In the figure shown, L₁ = 5.4m, L₂ = 3.3m and L₃ = 8m. What is F₁ if F₂ =9.8N and F₃ =5.7N?

a) 6.70E+00 N

b) 8.12E+00 N

c) 9.83E+00 N

d) 1.19E+01 N

e) 1.44E+01 N

96)

A massless bar of length, S = 8.8m is attached to a wall by a frictionless hinge (shown as a circle). The bar is held horizontal by a string that makes and angle θ = 27.3 degrees above the horizontal. An object of mass, M = 8.2kg is suspended at a length, L = 4.7m from the wall. What is the x (horizontal) component of the force exerted by the wall on the horizontal bar?

a) 6.86E+01 N

b) 8.32E+01 N

c) 1.01E+02 N

d) 1.22E+02 N

e) 1.48E+02 N

97)

In the figure shown, L₁ = 6m, L₂ = 4.3m and L₃ = 8.7m. What is F₂ if F₁ =0.98N and F₃ =0.1N?

a) 5.41E-01 N

b) 6.55E-01 N

c) 7.94E-01 N

d) 9.62E-01 N

e) 1.17E+00 N

98)

A massless bar of length, S = 7.6m is attached to a wall by a frictionless hinge (shown as a circle). The bar is held horizontal by a string that makes and angle θ = 27.6 degrees above the horizontal. An object of mass, M = 5.1kg is suspended at a length, L =6.2m from the wall. What is the y (vertical) component of the force exerted by the wall on the horizontal bar?

a) 7.60E+00 N

b) 9.21E+00 N

c) 1.12E+01 N

d) 1.35E+01 N

e) 1.64E+01 N

99) A car with a tire radius of 0.26 m accelerates from 0 to 27 m/s in 9.5 seconds. What is the angular acceleration of the wheel?

a) 1.09 x 10¹ m

b) 1.32 x 10¹ m

c) 1.6 x 10¹ m

d) 1.94 x 10¹ m

e) 2.36 x 10¹ m

100) A lead filled bicycle wheel of radius 0.47 m and mass 2.2 kg is rotating at a frequency of 1.9 revolutions per second. What is the moment of inertia?

a) 3.31 x 10^-1 kg m²/s²

b) 4.01 x 10^-1 kg m²/s²

c) 4.86 x 10^-1 kg m²/s²

d) 5.89 x 10^-1 kg m²/s²

e) 7.13 x 10^-1 kg m²/s²

101) A lead filled bicycle wheel of radius 0.47 m and mass 2.2 kg is rotating at a frequency of 1.9 revolutions per second. What is the total kinetic energy if the wheel is rotating about a stationary axis?

a) 3.46 x 10¹ J

b) 4.2 x 10¹ J

c) 5.08 x 10¹ J

d) 6.16 x 10¹ J

e) 7.46 x 10¹ J

102)

The moment of inertia of a solid disk of mass, M, and radius, R, is ½ MR². Two identical disks, each with mass 2.7 kg are attached. The larger disk has a diameter of 0.87 m, and the smaller disk has a diameter of 0.45 m. If a force of 55 N is applied at the rim of the smaller disk, what is the angular acceleration?

a) 2.6 x 10¹ s^-2

b) 3.15 x 10¹ s^-2

c) 3.82 x 10¹ s^-2

d) 4.63 x 10¹ s^-2

e) 5.61 x 10¹ s^-2

103) A cylinder with a radius of 0.25 m and a length of 2.5 m is held so that the top circular face is 4.2 m below the water. The mass of the block is 853.0 kg. The mass density of water is 1000kg/m^3. What is the pressure at the top face of the cylinder?

a) 3.40E4 Pa

b) 4.12E4 Pa

c) 4.99E4 Pa

d) 6.04E4 Pa

e) 7.32E4 Pa

104) A cylinder with a radius of 0.25 m and a length of 2.5 m is held so that the top circular face is 4.2 m below the water. The mass of the block is 853.0 kg. The mass density of water is 1000kg/m^3. What is the buoyant force?

a) 2.71E3 N

b) 3.28E3 N

c) 3.97E3 N

d) 4.81E3 N

e) 5.83E3 N

105) A cylinder with a radius of 0.25 m and a length of 2.5 m is held so that the top circular face is 4.2 m below the water. The mass of the block is 853.0 kg. The mass density of water is 1000kg/m^3. What is the force exerted by the water at the top surface?

a) 8.08E3 N

b) 1.02E4 N

c) 1.28E4 N

d) 1.61E4 N

e) 2.03E4 N

106) A cylinder with a radius of 0.25 m and a length of 2.5 m is held so that the top circular face is 4.2 m below the water. The mass of the block is 853.0 kg. The mass density of water is 1000kg/m^3. What is the force exerted by the fluid on the bottom of the cylinder?

a) 1.02E4 Pa

b) 1.29E4 Pa

c) 1.62E4 Pa

d) 2.04E4 Pa

e) 2.57E4 Pa

107) A 9.4 cm diameter pipe can fill a 2.2 m^3 volume in 5.0 minutes. Before exiting the pipe, the diameter is reduced to 3.1 cm (with no loss of flow rate). What is the speed in the first (wider) pipe?

a) 5.94E-1 m/s

b) 7.20E-1 m/s

c) 8.72E-1 m/s

d) 1.06E0 m/s

e) 1.28E0 m/s

108) A 9.4 cm diameter pipe can fill a 2.2 m^3 volume in 5.0 minutes. Before exiting the pipe, the diameter is reduced to 3.1 cm (with no loss of flow rate). What is the pressure difference (in Pascals) between the two regions of the pipe?

a) 3.85E4

b) 4.66E4

c) 5.65E4

d) 6.85E4

e) 8.29E4

109) A 9.4 cm diameter pipe can fill a 2.2 m^3 volume in 5.0 minutes. Before exiting the pipe, the diameter is reduced to 3.1 cm (with no loss of flow rate). If two fluid elements at the center of the pipe are separated by 21.0 mm when they are both in the wide pipe, and we neglect turbulence, what is the separation when both are in the narrow pipe?

a) 1.59E2 mm

b) 1.93E2 mm

c) 2.34E2 mm

d) 2.83E2 mm

e) 3.43E2 mm

110) A large cylinder is filled with water so that the bottom is 8.6 m below the waterline. At the bottom is a small hole with a diameter of 9.1E-4 m. How fast is the water flowing at the hole? (Neglect viscous effects, turbulence, and also assume that the hole is so small that no significant motion occurs at the top of the cylinder.)

a) 1.30E1 m/s

b) 1.57E1 m/s

c) 1.91E1 m/s

d) 2.31E1 m/s

e) 2.80E1 m/s

111) What is the root-mean-square of 33, 27, and -39?

a) 2.105 x 10¹

b) 2.362 x 10¹

c) 2.65 x 10¹

d) 2.973 x 10¹

e) 3.336 x 10¹

112) What is the rms speed of a molecule with an atomic mass of 20 if the temperature is 86 degrees Fahrenheit?

a) 6.15 x 10² m/s

b) 7.45 x 10² m/s

c) 9.03 x 10² m/s

d) 1.09 x 10³ m/s

e) 1.32 x 10³ m/s

113) If a molecule with atomic mass equal to 9 amu has a speed of 431 m/s, what is the speed at an atom in the same atmosphere of a molecule with an atomic mass of 23 ?

a) 1.84 x 10² m/s

b) 2.23 x 10² m/s

c) 2.7 x 10² m/s

d) 3.27 x 10² m/s

e) 3.96 x 10² m/s

114) The specific heat of water and aluminum are 4186 and 900, respectively, where the units are J/kg/Celsius. An aluminum container of mass 0.71 kg is filled with 0.19 kg of water. How much heat does it take to raise both from 53.5 C to 86.9 C?

a) 4.79 x 10⁴ J

b) 5.65 x 10⁴ J

c) 6.66 x 10⁴ J

d) 7.85 x 10⁴ J

e) 9.25 x 10⁴ J

115) {The specific heat of water and aluminum are 4186 and 900, respectively, where the units are J/kg/Celsius. An aluminum container of mass 0.71 kg is filled with 0.19 kg of water. What fraction of the heat went into the aluminum?

a) 2.3 x 10^-1

b) 2.7 x 10^-1

c) 3.2 x 10^-1

d) 3.8 x 10^-1

e) 4.5 x 10^-1

116) {The specific heat of water and aluminum are 4186 and 900, respectively, where the units are J/kg/Celsius. An aluminum container of mass 0.71 kg is filled with 0.19 kg of water. You are consulting for the flat earth society, a group of people who believe that the acceleration of gravity equals 9.8 m/s/s at all altitudes. Based on this assumption, from what height must the water and container be dropped to achieve the same change in temperature? (For comparison, Earth's radius is 6,371 kilometers)

a) 5.43 x 10⁰ km

b) 6.58 x 10⁰ km

c) 7.97 x 10⁰ km

d) 9.66 x 10⁰ km

e) 1.17 x 10¹ km

117) A window is square, with a length of each side equal to 0.95 meters. The glass has a thickness of 13 mm. To decrease the heat loss, you reduce the size of the window by decreasing the length of each side by a factor of 1.59. You also increase the thickness of the glass by a factor of 2.84. If the inside and outside temperatures are unchanged, by what factor have you decreased the heat flow?. By what factor have you decreased the heat flow (assuming the same inside and outside temperatures).

a) 7.18 x 10⁰ unit

b) 8.7 x 10⁰ unit

c) 1.05 x 10¹ unit

d) 1.28 x 10¹ unit

e) 1.55 x 10¹ unit

118)

A 1241 heat cycle uses 2.1 moles of an ideal gas. The pressures and volumes are: P₁= 2.2 kPa, P₂= 4.4 kPa. The volumes are V₁= 2.6m³ and V₄= 4m³. How much work is done in in one cycle?

a) 4.87 x 10¹ J

b) 1.54 x 10² J

c) 4.87 x 10² J

d) 1.54 x 10³ J

e) 4.87 x 10³ J

119)

A 1241 heat cycle uses 1.2 moles of an ideal gas. The pressures and volumes are: P₁= 2.7 kPa, P₂= 3.8 kPa. The volumes are V₁= 1.8m³ and V₄= 4.7m³. How much work is involved between 1 and 4?

a) 7.83 x 10³ J

b) 2.48 x 10⁴ J

c) 7.83 x 10⁴ J

d) 2.48 x 10⁵ J

e) 7.83 x 10⁵ J

120)

A 1241 heat cycle uses 1.1 moles of an ideal gas. The pressures and volumes are: P₁= 1.4 kPa, P₂= 2.8 kPa. The volumes are V₁= 2.7m³ and V₄= 4.6m³. How much work is involved between 2 and 4?

a) 3.99 x 10¹ J

b) 1.26 x 10² J

c) 3.99 x 10² J

d) 1.26 x 10³ J

e) 3.99 x 10³ J

121)

A 1241 heat cycle uses 2.5 moles of an ideal gas. The pressures and volumes are: P₁= 2.9 kPa, P₂= 4.9 kPa. The volumes are V₁= 2.5m³ and V₄= 4.7m³. What is the temperature at step 4?

a) 2.07 x 10² K

b) 6.56 x 10² K

c) 2.07 x 10³ K

d) 6.56 x 10³ K

e) 2.07 x 10⁴ K

Answer Key

1) A car traveling at 33.5 miles/hour stops in 7.9 seconds. What is the average acceleration?

- 3.37 x 10^-1 m/s²

- 5.99 x 10^-1 m/s²

- 1.07 x 10⁰ m/s²

+ 1.9 x 10⁰ m/s²

- 3.37 x 10⁰ m/s²

2) A car completes a complete circle of radius 2.9 miles at a speed of 42.2 miles per hour. How many minutes does it take?

+ 2.59 x 10¹ minutes

- 3.45 x 10¹ minutes

- 4.61 x 10¹ minutes

- 6.14 x 10¹ minutes

- 8.19 x 10¹ minutes

3) A car traveling at 33.8 mph increases its speed to 38.3 mph in 6.7seconds. What is the average acceleration?

- 9.49 x 10^-2 m/s²

- 1.69 x 10^-1 m/s²

+ 3 x 10^-1 m/s²

- 5.34 x 10^-1 m/s²

- 9.49 x 10^-1 m/s²

4) Mr. Smith is backing his car at a speed of 2.42 mph when he hits a cornfield (seed corn). In the course of 2.35 seconds he stops, puts his car in forward drive, and exits the field at a speed of 6.1 mph. What was the magnitude ( absolute value) of his acceleration?

- 2.29 x 10⁰ miles per hour per second

- 2.88 x 10⁰ miles per hour per second

+ 3.63 x 10⁰ miles per hour per second

- 4.56 x 10⁰ miles per hour per second

- 5.75 x 10⁰ miles per hour per second

5) A car is accelerating uniformly at an acceleration of 3.75m/s/s. At x = 5.25m, the speed is 3.55m/s. How fast is it moving at x = 11.5 m?

- 3.72 m/s.

- 4.46 m/s.

- 5.36 m/s.

- 6.43 m/s.

+ 7.71 m/s.

6) What is the acceleration if a car travelling at 9.95 m/s makes a skid mark that is 7.5 m long before coming to rest? (Assume uniform acceleration.)

- 5.5m/s².

+ 6.6m/s².

- 7.92m/s².

- 9.5m/s².

- 11.41m/s².

7) A train accelerates uniformly from 14.25 m/s to 29.625 m/s, while travelling a distance of 490 m. What is the 'average' acceleration?

- 0.48m/s/s.

- 0.57m/s/s.

+ 0.69m/s/s.

- 0.83m/s/s.

- 0.99m/s/s.

8) A particle accelerates uniformly at 16.75 m/s/s. How long does it take for the velocity to increase from 957 m/s to 1935 m/s?

- 33.79 s

- 40.55 s

- 48.66 s

+ 58.39 s

- 70.07 s

9) Mr. Smith starts from rest and accelerates to 4 m/s in 3 seconds. How far did he travel?

- 3.0 meters

- 4.0 meters

- 5.0 meters

+ 6.0 meters

- 7.0 meters

10) Mr. Smith starts from rest and accelerates to 4 m/s in 5 seconds. How far did he travel?

- 7.0 meters

- 8.0 meters

- 9.0 meters

+ 10.0 meters

- 11.0 meters

11) Mr. Smith is driving at a speed of 7 m/s, when he slows down to a speed of 5 m/s, when he hits a wall at this speed, after travelling for 2 seconds. How far did he travel?

- 8.0 meters

- 9.0 meters

- 10.0 meters

- 11.0 meters

+ 12.0 meters

12) Mr. Smith starts at rest and accelerates to a speed of 2 m/s, in 2 seconds. He then travels at this speed for an additional 1 seconds. Then he decelerates uniformly, taking 2 seconds to come to rest. How far did he travel?

- 5.0 meters

+ 6.0 meters

- 7.0 meters

- 8.0 meters

- 9.0 meters

13) Mr. Smith is driving at a speed of 4 m/s, when he slows down to a speed of 1 m/s, when he hits a wall at this speed, after travelling for 4 seconds. How far did he travel?

- 7.0 meters

- 8.0 meters

- 9.0 meters

+ 10.0 meters

- 11.0 meters

14) Mr. Smith starts at rest and accelerates to a speed of 4 m/s, in 2 seconds. He then travels at this speed for an additional 3 seconds. Then he decelerates uniformly, taking 2 seconds to come to rest. How far did he travel?

- 19.0 meters

+ 20.0 meters

- 21.0 meters

- 22.0 meters

- 23.0 meters

15) Mr. Smith starts from rest and accelerates to 2 m/s in 3 seconds. How far did he travel?

+ 3.0 meters

- 4.0 meters

- 5.0 meters

- 6.0 meters

- 7.0 meters

16) Mr. Smith is driving at a speed of 5 m/s, when he slows down to a speed of 4 m/s, when he hits a wall at this speed, after travelling for 2 seconds. How far did he travel?

- 8.0 meters

+ 9.0 meters

- 10.0 meters

- 11.0 meters

- 12.0 meters

17) Mr. Smith starts at rest and accelerates to a speed of 2 m/s, in 6 seconds. He then travels at this speed for an additional 3 seconds. Then he decelerates uniformly, taking 4 seconds to come to rest. How far did he travel?

+ 16.0 meters

- 17.0 meters

- 18.0 meters

- 19.0 meters

- 20.0 meters

18) Mr. Smith starts from rest and accelerates to 3 m/s in 2 seconds. How far did he travel?

- 1.0 meters

- 2.0 meters

+ 3.0 meters

- 4.0 meters

- 5.0 meters

19) Mr. Smith is driving at a speed of 7 m/s, when he slows down to a speed of 5 m/s, when he hits a wall at this speed, after travelling for 4 seconds. How far did he travel?

- 23.0 meters

+ 24.0 meters

- 25.0 meters

- 26.0 meters

- 27.0 meters

20) Mr. Smith starts at rest and accelerates to a speed of 2 m/s, in 6 seconds. He then travels at this speed for an additional 3 seconds. Then he decelerates uniformly, taking 4 seconds to come to rest. How far did he travel?

- 13.0 meters

- 14.0 meters

- 15.0 meters

+ 16.0 meters

- 17.0 meters

21) A ball is kicked horizontally from a height of 2.7 m, at a speed of 7.5m/s. How far does it travel before landing?

- 3.22 m.

- 3.87 m.

- 4.64 m.

+ 5.57 m.

- 6.68 m.

22) A particle is initially at the origin and moving in the x direction at a speed of 4.3 m/s. It has an constant acceleration of 2.2 m/s² in the y direction, as well as an acceleration of 0.3 in the x direction. What angle does the velocity make with the x axis at time t = 2.8 s?

- 37.93 degrees.

- 43.62 degrees.

+ 50.16 degrees.

- 57.68 degrees.

- 66.33 degrees.

23) At time, t=0, two particles are on the x axis. Particle A is (initially) at the origin and moves at a constant speed of 5.42 m/s at an angle of θ above the x-axis. Particle B is initially situated at x= 2.89 m, and moves at a constant speed of 2.26 m/s in the +y direction. At what time do they meet?

- 0.49 s.

+ 0.59 s.

- 0.7 s.

- 0.84 s.

- 1.01 s.

24) At time, t=0, two particles are on the x axis. Particle A is (initially) at the origin and moves at a constant speed of 5.15 m/s at an angle of θ above the x-axis. Particle B is initially situated at x= 2.05 m, and moves at a constant speed of 2.94 m/s in the +y direction. What is the value of θ (in radians)?

- 0.46 radians.

- 0.53 radians.

+ 0.61 radians.

- 0.7 radians.

- 0.8 radians.

25) The Smith family is having fun on a high speed train travelling at 48.8 m/s. Mr. Smith is at the back of the train and fires a pellet gun with a muzzle speed of 25.7 m/s at Mrs. Smith who is at the front of the train. What is the speed of the bullet with respect to Earth?

- 22.1 m/s.

- 33.1 m/s.

- 49.7 m/s.

+ 74.5 m/s.

- 111.8 m/s.

26) The Smith family is having fun on a high speed train travelling at 48.8 m/s. Mrs. Smith, who is at the front of the train, fires straight towards the back with a bullet that is going forward with respect to Earth at a speed of 20.2 m/s. What was the muzzle speed of her bullet?

- 8.5 m/s.

- 12.7 m/s.

- 19.1 m/s.

+ 28.6 m/s.

- 42.9 m/s.

27) The Smith family is having fun on a high speed train travelling at 48.8 m/s. The daugher fires at Mr. Smith with a pellet gun whose muzzle speed is 21.6 m/s. She was situated across the isle, perpendicular to the length of the train. What is the speed of her bullet with respect to Earth?

- 15.8 m/s.

- 23.7 m/s.

- 35.6 m/s.

+ 53.4 m/s.

- 80 m/s.

28) The Smith family got in trouble for having fun on a high speed train travelling at 48.8 m/s. Mr. Smith is charged with having fired a pellet gun at his daughter (directly across the isle) with a bullet that had a speed of 92.5 m/s with respect to Earth. How fast was the bullet going relative to the daughter (i.e. train)?

- 45.5 m/s.

- 54.6 m/s.

- 65.5 m/s.

+ 78.6 m/s.

- 94.3 m/s.

29) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

- the cloth is more slippery when it is pulled quickly

+ the cloth is accelerating for such a brief time that there is little motion

- objects don't begin to accelerate until after the force has been applied

30) If you toss a coin into the air, the acceleration while it as its highest point is

- up

+ down

- zero

31) If you toss a coin into the air, the velocity on the way up is

- zero

- down

+ up

32) If you toss a coin into the air, the velocity on the way down is

+ down

- zero

- up

33) If you toss a coin into the air, the velocity while it as its highest point is

- up

+ zero

- down

34) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

+ northwest

- south

- southwest

- north

- northeast

35) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

- southwest

- south

- northwest

- north

+ northeast

36) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

- northeast

- southeast

- northeast

- northwest

+ north

37) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

+ north

- northwest

- south

- northeast

- southwest

38) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

- west

- northwest

+ southwest

- southeast

- south

39) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

- northwest

- north

- south

- northeast

+ southeast

40) A car is traveling west and slowing down. The acceleration is

- zero

+ to the east

- to the west

41) A car is traveling east and slowing down. The acceleration is

- zero

- to the east

+ to the west

42) A car is traveling east and speeding up. The acceleration is

+ to the east

- to the west

- zero

43) If you toss a coin into the air, the acceleration on the way up is

+ down

- zero

- up

44) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

+ west

- zero

- south

- north

- east

45) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

+ east

- south

- north

- zero

- west

46) As the Moon circles Earth, the acceleration of the Moon is

- away from Earth

+ towards Earth

- opposite the direction of the Moon's velocity

- in the same direction as the Moon's velocity

- zero

47) If you toss a coin into the air, the acceleration on the way down is

- up

+ down

- zero

48) A mass with weight (mg) of 48 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 30 degrees. What is the tension in the string?

+ 24.8 N.

- 28.6 N.

- 32.9 N.

- 37.8 N.

- 43.5 N.

49) A mass with weight (mg) equal to 29 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 60 degrees with respect to the horizontal. What is the tension in each string?

- 12.7 N.

- 14.6 N.

+ 16.7 N.

- 19.3 N.

- 22.1 N.

50) A 2.1 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.46 . In addition to the surface friction, there is also an air drag equal to 14 N. What is the magnitude (absolute value) of the acceleration?

- 6.4 m/s².

- 7.3 m/s².

- 8.4 m/s².

- 9.7 m/s².

+ 11.2 m/s².

51) A mass with weight (mg) 5.3 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 3.05 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

- 0.34

- 0.4

- 0.49

- 0.58

+ 0.7

52) A sled of mass 5.7 kg is at rest on a rough surface. A string pulls with a tension of 41.6N at an angle of 34 degress above the horizontal. What is the magnitude of the friction?

- 19.72 N.

- 22.68 N.

- 26.08 N.

- 29.99 N.

+ 34.49 N.

53) A sled of mass 5.4 kg is at rest on a rough surface. A string pulls with a tension of 40.4N at an angle of 39 degress above the horizontal. What is the normal force?

+ 27.5 N.

- 31.62 N.

- 36.36 N.

- 41.82 N.

- 48.09 N.

54) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 44.3N at an angle of 31 degress above the horizontal. How long will it take to reach a speed of 9.2 m/s?

- 0.91 s

- 1.04 s

- 1.2 s

+ 1.38 s

- 1.59 s

55) A sled of mass 2.3 kg is on perfectly smooth surface. A string pulls with a tension of 18.3N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.8 m/s²?

+ 69.4 degrees

- 79.8 degrees

- 91.8 degrees

- 105.5 degrees

- 121.4 degrees

56)

In the figure shown, θ₁ is 18 degrees, and θ₃ is 38 degrees. The tension T₃ is 19 N. What is the tension, T₁?

- 10.35 N.

- 11.9 N.

- 13.69 N.

+ 15.74 N.

- 18.1 N.

57)

In the figure shown, θ₁ is 18 degrees, and θ₃ is 38 degrees. The tension T₃ is 19 N. What is the weight?

- 14.4 N.

+ 16.6 N.

- 19 N.

- 21.9 N.

- 25.2 N.

58)

rilght

In the figure shown, θ is 28 degrees, and the mass is 2.5 kg. What is T₂?

- 45.38 N.

+ 52.19 N.

- 60.01 N.

- 69.02 N.

- 79.37 N.

59)

rilght

In the figure shown, θ is 28 degrees, and the mass is 2.5 kg. What is T₁?

- 32 N.

- 38.4 N.

+ 46.1 N.

- 55.3 N.

- 66.4 N.

60)

In the figure shown, θ₁ is 16 degrees , and θ₃ is 30 degrees . The mass has a 'weight' of 44 N. What is the tension, T₁?

- 34.83 N.

- 40.05 N.

- 46.06 N.

+ 52.97 N.

- 60.92 N.

61)

In the figure shown, the mass of m₁ is 6.4 kg, and the mass of m₂ is 2.3 kg. If the external force, F_ext on m₂ is 174 N, what is the tension in the connecting string? Assume no friction is present.

- 84.2 N

- 96.8 N

- 111.3 N

+ 128 N

- 147.2 N

62)

In the figure shown (with m₁ = 6.4 kg, m₂ = 2.3 kg, and F_ext = 174 N), what is the acceleration? Assume no friction is present.

+ 20 m/s²

- 23 m/s²

- 26.5 m/s²

- 30.4 m/s²

- 35 m/s²

63) Nine barefoot baseball players, with a total mass of 640 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.68 . The net mass of the (shoed) basketball team is 431 kg. What is the maximum coefficient of the barefoot boys if they lose?

- 0.313

- 0.344

- 0.378

- 0.416

+ 0.458

64) Without their shoes, members of a 9 person baseball team have a coefficient of static friction of only 0.24 . But the team wins a game of tug of war due to their superior mass of 643 kg. They are playing against a 5 person basketball team with a net mass of 405 kg. What is the maximum coefficient of static friction of the basketball team?

- 0.26

- 0.286

- 0.315

- 0.346

+ 0.381

65)

In the figure shown, the mass of m₁ is 6.9 kg, and the mass of m₂ is 3 kg. If the external force, F_ext on m₂ is 131 N, what is the tension in the connecting string? Assume that m₁ has a kinetic coefficient of friction equal to 0.31, and that for m₂ the coefficient is 0.49 .

- 76.2 N

+ 87.6 N

- 100.8 N

- 115.9 N

- 133.3 N

66) A merry-go-round has an angular frequency, $\omega$, equal to 0.174 rad/sec. How many minutes does it take to complete 8.5 revolutions?

- 3.87 minutes.

- 4.45 minutes.

+ 5.12 minutes.

- 5.88 minutes.

- 6.77 minutes.

67) A merry-go round has a period of 0.34 minutes. What is the centripetal force on a 89.6 kg person who is standing 2.25 meters from the center?

- 16.6 newtons.

+ 19.1 newtons.

- 22 newtons.

- 25.3 newtons.

- 29.1 newtons.

68) A merry-go round has a period of 0.34 minutes. What is the minimum coefficient of static friction that would allow a 89.6 kg person to stand2.25 meters from the center, without grabbing something?

- 0.019

+ 0.022

- 0.025

- 0.029

- 0.033

69) What is the gravitational acceleration on a plant that is 2.67 times more massive than Earth, and a radius that is 1.74 times greater than Earths?

- 5.7 m/s²

- 6.5 m/s²

- 7.5 m/s²

+ 8.6 m/s²

- 9.9 m/s²

70) What is the gravitational acceleration on a plant that is 1.95 times more dense than Earth, and a radius that is 2.12 times greater than Earth's?

+ 40.5 m/s²

- 46.6 m/s²

- 53.6 m/s²

- 61.6 m/s²

- 70.9 m/s²

71)

Is $dv/d\ell =v/r$ valid for uniform circular motion?

+ Yes

- No

72)

Is $dv/r=d\ell /v$ valid for uniform circular motion?

- Yes

+ No

73)

Is $rd\ell =vdv$ valid for uniform circular motion?

- Yes

+ No

74)

Is $dv=|{\vec {v}}_{2}|-|{\vec {v}}_{1}|$ valid for uniform circular motion?

- Yes

+ No

75)

Is $d\ell /dv=v/r$ valid for uniform circular motion?

- Yes

+ No

76)

Is $dv/d\ell =r/v$ valid for uniform circular motion?

- Yes

+ No

77)

Is $dv=|{\vec {v}}_{2}-{\vec {v}}_{1}|$ valid for uniform circular motion?

+ Yes

- No

78)

Is $d\ell =vdt$ valid for uniform circular motion?

+ Yes

- No

79)

Is $adt/v=vdt/r$ valid for uniform circular motion?

+ Yes

- No

80)

Is $dv=adt$ valid for uniform circular motion?

+ Yes

- No

81)

Is $|d{\vec {v}}|=adt$ valid for uniform circular motion?

+ Yes

- No

82)

Is $d\ell =|{\vec {r}}_{2}-{\vec {r}}_{1}|$ valid for uniform circular motion?

+ Yes

- No

83)

Is $d\ell =|{\vec {r}}_{2}|-|{\vec {r}}_{1}|$ valid for uniform circular motion?

- Yes

+ No

84)

Is $v/d\ell =r/dv$ valid for uniform circular motion?

- Yes

+ No

85) If the initial velocity after leaving the spring is 9.60 m/s, how high does it reach before coming to rest?

- 3.87 m

- 4.06 m

- 4.26 m

- 4.48 m

+ 4.70 m

86) The mass of the cart is 2.0kg, and the spring constant is 6541N/m. If the initial compression of the spring is 2.00m, how high does it reach before coming to rest?

+ 6.67E+02 m

- 7.01E+02 m

- 7.36E+02 m

- 7.73E+02 m

- 8.11E+02 m

87) What is the highest point the cart reaches if the speed was 2.8m/s, when the cart was situated at a height of 2.3m?,

- 2.19 m

+ 2.30 m

- 2.42 m

- 2.54 m

- 2.66 m

88) The spring constant is 663N/m, and the initial compression is 0.22m. What is the mass if the cart reaches a height of 2.80m, before coming to rest?

- 0.481 kg

- 0.505 kg

- 0.530 kg

- 0.557 kg

+ 0.585 kg

89) The cart has a mass of 36.20kg. It is moving at a speed of 3.50m/s, when it is at a height of 3.70m. If the spring constant was 518N/m, what was the initial compression?

- 2.13 m

- 2.27 m

+ 2.43 m

- 2.60 m

- 2.79 m

90) You are riding a bicycle on a flat road. Assume no friction or air drag, and that you are coasting. Your speed is 4.9m/s, when you encounter a hill of height 1.14m. What is your speed at the top of the hill?

+ 1.291 m/s

- 1.368 m/s

- 1.450 m/s

- 1.537 m/s

- 1.630 m/s

91) On object of mass 3 kg that is moving at a velocity of 17m/s collides with a stationary object of mass 10.2 kg. What is the final velocity if they stick? (Assume no external friction.)

- 2.68m/s.

- 3.22m/s.

+ 3.86m/s.

- 4.64m/s.

- 5.56m/s.

92) A car of mass 634 kg is driving on an icy road at a speed of 17 m/s, when it collides with a stationary truck. After the collision they stick and move at a speed of 5.5 m/s. What was the mass of the truck?

- 767 kg

- 921 kg

- 1105 kg

+ 1326 kg

- 1591 kg

93)

A 159 gm bullet strikes a ballistic pendulum of mass 2.08 kg (before the bullet struck). After impact, the pendulum rises by 65 cm. What was the speed of the bullet?

- 44 m/s.

- 47 m/s.

+ 50 m/s.

- 54 m/s.

- 58 m/s.

94)

A massless bar of length, S = 9.3m is attached to a wall by a frictionless hinge (shown as a circle). The bar is held horizontal by a string that makes and angle θ = 28.1 degrees above the horizontal. An object of mass, M = 8.1kg is suspended at a length, L = 5.7m from the wall. What is the tension, T, in the string?

- 8.20E+01 N

+ 1.03E+02 N

- 1.30E+02 N

- 1.64E+02 N

- 2.06E+02 N

95)

In the figure shown, L₁ = 5.4m, L₂ = 3.3m and L₃ = 8m. What is F₁ if F₂ =9.8N and F₃ =5.7N?

- 6.70E+00 N

- 8.12E+00 N

- 9.83E+00 N

- 1.19E+01 N

+ 1.44E+01 N

96)

A massless bar of length, S = 8.8m is attached to a wall by a frictionless hinge (shown as a circle). The bar is held horizontal by a string that makes and angle θ = 27.3 degrees above the horizontal. An object of mass, M = 8.2kg is suspended at a length, L = 4.7m from the wall. What is the x (horizontal) component of the force exerted by the wall on the horizontal bar?

- 6.86E+01 N

+ 8.32E+01 N

- 1.01E+02 N

- 1.22E+02 N

- 1.48E+02 N

97)

In the figure shown, L₁ = 6m, L₂ = 4.3m and L₃ = 8.7m. What is F₂ if F₁ =0.98N and F₃ =0.1N?

- 5.41E-01 N

- 6.55E-01 N

- 7.94E-01 N

- 9.62E-01 N

+ 1.17E+00 N

98)

A massless bar of length, S = 7.6m is attached to a wall by a frictionless hinge (shown as a circle). The bar is held horizontal by a string that makes and angle θ = 27.6 degrees above the horizontal. An object of mass, M = 5.1kg is suspended at a length, L =6.2m from the wall. What is the y (vertical) component of the force exerted by the wall on the horizontal bar?

- 7.60E+00 N

+ 9.21E+00 N

- 1.12E+01 N

- 1.35E+01 N

- 1.64E+01 N

99) A car with a tire radius of 0.26 m accelerates from 0 to 27 m/s in 9.5 seconds. What is the angular acceleration of the wheel?

+ 1.09 x 10¹ m

- 1.32 x 10¹ m

- 1.6 x 10¹ m

- 1.94 x 10¹ m

- 2.36 x 10¹ m

100) A lead filled bicycle wheel of radius 0.47 m and mass 2.2 kg is rotating at a frequency of 1.9 revolutions per second. What is the moment of inertia?

- 3.31 x 10^-1 kg m²/s²

- 4.01 x 10^-1 kg m²/s²

+ 4.86 x 10^-1 kg m²/s²

- 5.89 x 10^-1 kg m²/s²

- 7.13 x 10^-1 kg m²/s²

101) A lead filled bicycle wheel of radius 0.47 m and mass 2.2 kg is rotating at a frequency of 1.9 revolutions per second. What is the total kinetic energy if the wheel is rotating about a stationary axis?

+ 3.46 x 10¹ J

- 4.2 x 10¹ J

- 5.08 x 10¹ J

- 6.16 x 10¹ J

- 7.46 x 10¹ J

102)

The moment of inertia of a solid disk of mass, M, and radius, R, is ½ MR². Two identical disks, each with mass 2.7 kg are attached. The larger disk has a diameter of 0.87 m, and the smaller disk has a diameter of 0.45 m. If a force of 55 N is applied at the rim of the smaller disk, what is the angular acceleration?

- 2.6 x 10¹ s^-2

- 3.15 x 10¹ s^-2

+ 3.82 x 10¹ s^-2

- 4.63 x 10¹ s^-2

- 5.61 x 10¹ s^-2

103) A cylinder with a radius of 0.25 m and a length of 2.5 m is held so that the top circular face is 4.2 m below the water. The mass of the block is 853.0 kg. The mass density of water is 1000kg/m^3. What is the pressure at the top face of the cylinder?

- 3.40E4 Pa

+ 4.12E4 Pa

- 4.99E4 Pa

- 6.04E4 Pa

- 7.32E4 Pa

104) A cylinder with a radius of 0.25 m and a length of 2.5 m is held so that the top circular face is 4.2 m below the water. The mass of the block is 853.0 kg. The mass density of water is 1000kg/m^3. What is the buoyant force?

- 2.71E3 N

- 3.28E3 N

- 3.97E3 N

+ 4.81E3 N

- 5.83E3 N

105) A cylinder with a radius of 0.25 m and a length of 2.5 m is held so that the top circular face is 4.2 m below the water. The mass of the block is 853.0 kg. The mass density of water is 1000kg/m^3. What is the force exerted by the water at the top surface?

+ 8.08E3 N

- 1.02E4 N

- 1.28E4 N

- 1.61E4 N

- 2.03E4 N

106) A cylinder with a radius of 0.25 m and a length of 2.5 m is held so that the top circular face is 4.2 m below the water. The mass of the block is 853.0 kg. The mass density of water is 1000kg/m^3. What is the force exerted by the fluid on the bottom of the cylinder?

- 1.02E4 Pa

+ 1.29E4 Pa

- 1.62E4 Pa

- 2.04E4 Pa

- 2.57E4 Pa

107) A 9.4 cm diameter pipe can fill a 2.2 m^3 volume in 5.0 minutes. Before exiting the pipe, the diameter is reduced to 3.1 cm (with no loss of flow rate). What is the speed in the first (wider) pipe?

- 5.94E-1 m/s

- 7.20E-1 m/s

- 8.72E-1 m/s

+ 1.06E0 m/s

- 1.28E0 m/s

108) A 9.4 cm diameter pipe can fill a 2.2 m^3 volume in 5.0 minutes. Before exiting the pipe, the diameter is reduced to 3.1 cm (with no loss of flow rate). What is the pressure difference (in Pascals) between the two regions of the pipe?

- 3.85E4

+ 4.66E4

- 5.65E4

- 6.85E4

- 8.29E4

109) A 9.4 cm diameter pipe can fill a 2.2 m^3 volume in 5.0 minutes. Before exiting the pipe, the diameter is reduced to 3.1 cm (with no loss of flow rate). If two fluid elements at the center of the pipe are separated by 21.0 mm when they are both in the wide pipe, and we neglect turbulence, what is the separation when both are in the narrow pipe?

- 1.59E2 mm

+ 1.93E2 mm

- 2.34E2 mm

- 2.83E2 mm

- 3.43E2 mm

110) A large cylinder is filled with water so that the bottom is 8.6 m below the waterline. At the bottom is a small hole with a diameter of 9.1E-4 m. How fast is the water flowing at the hole? (Neglect viscous effects, turbulence, and also assume that the hole is so small that no significant motion occurs at the top of the cylinder.)

+ 1.30E1 m/s

- 1.57E1 m/s

- 1.91E1 m/s

- 2.31E1 m/s

- 2.80E1 m/s

111) What is the root-mean-square of 33, 27, and -39?

- 2.105 x 10¹

- 2.362 x 10¹

- 2.65 x 10¹

- 2.973 x 10¹

+ 3.336 x 10¹

112) What is the rms speed of a molecule with an atomic mass of 20 if the temperature is 86 degrees Fahrenheit?

+ 6.15 x 10² m/s

- 7.45 x 10² m/s

- 9.03 x 10² m/s

- 1.09 x 10³ m/s

- 1.32 x 10³ m/s

113) If a molecule with atomic mass equal to 9 amu has a speed of 431 m/s, what is the speed at an atom in the same atmosphere of a molecule with an atomic mass of 23 ?

- 1.84 x 10² m/s

- 2.23 x 10² m/s

+ 2.7 x 10² m/s

- 3.27 x 10² m/s

- 3.96 x 10² m/s

114) The specific heat of water and aluminum are 4186 and 900, respectively, where the units are J/kg/Celsius. An aluminum container of mass 0.71 kg is filled with 0.19 kg of water. How much heat does it take to raise both from 53.5 C to 86.9 C?

+ 4.79 x 10⁴ J

- 5.65 x 10⁴ J

- 6.66 x 10⁴ J

- 7.85 x 10⁴ J

- 9.25 x 10⁴ J

115) {The specific heat of water and aluminum are 4186 and 900, respectively, where the units are J/kg/Celsius. An aluminum container of mass 0.71 kg is filled with 0.19 kg of water. What fraction of the heat went into the aluminum?

- 2.3 x 10^-1

- 2.7 x 10^-1

- 3.2 x 10^-1

- 3.8 x 10^-1

+ 4.5 x 10^-1

116) {The specific heat of water and aluminum are 4186 and 900, respectively, where the units are J/kg/Celsius. An aluminum container of mass 0.71 kg is filled with 0.19 kg of water. You are consulting for the flat earth society, a group of people who believe that the acceleration of gravity equals 9.8 m/s/s at all altitudes. Based on this assumption, from what height must the water and container be dropped to achieve the same change in temperature? (For comparison, Earth's radius is 6,371 kilometers)

+ 5.43 x 10⁰ km

- 6.58 x 10⁰ km

- 7.97 x 10⁰ km

- 9.66 x 10⁰ km

- 1.17 x 10¹ km

117) A window is square, with a length of each side equal to 0.95 meters. The glass has a thickness of 13 mm. To decrease the heat loss, you reduce the size of the window by decreasing the length of each side by a factor of 1.59. You also increase the thickness of the glass by a factor of 2.84. If the inside and outside temperatures are unchanged, by what factor have you decreased the heat flow?. By what factor have you decreased the heat flow (assuming the same inside and outside temperatures).

+ 7.18 x 10⁰ unit

- 8.7 x 10⁰ unit

- 1.05 x 10¹ unit

- 1.28 x 10¹ unit

- 1.55 x 10¹ unit

118)

A 1241 heat cycle uses 2.1 moles of an ideal gas. The pressures and volumes are: P₁= 2.2 kPa, P₂= 4.4 kPa. The volumes are V₁= 2.6m³ and V₄= 4m³. How much work is done in in one cycle?

- 4.87 x 10¹ J

- 1.54 x 10² J

- 4.87 x 10² J

+ 1.54 x 10³ J

- 4.87 x 10³ J

119)

A 1241 heat cycle uses 1.2 moles of an ideal gas. The pressures and volumes are: P₁= 2.7 kPa, P₂= 3.8 kPa. The volumes are V₁= 1.8m³ and V₄= 4.7m³. How much work is involved between 1 and 4?

+ 7.83 x 10³ J

- 2.48 x 10⁴ J

- 7.83 x 10⁴ J

- 2.48 x 10⁵ J

- 7.83 x 10⁵ J

120)

A 1241 heat cycle uses 1.1 moles of an ideal gas. The pressures and volumes are: P₁= 1.4 kPa, P₂= 2.8 kPa. The volumes are V₁= 2.7m³ and V₄= 4.6m³. How much work is involved between 2 and 4?

- 3.99 x 10¹ J

- 1.26 x 10² J

- 3.99 x 10² J

- 1.26 x 10³ J

+ 3.99 x 10³ J

121)

A 1241 heat cycle uses 2.5 moles of an ideal gas. The pressures and volumes are: P₁= 2.9 kPa, P₂= 4.9 kPa. The volumes are V₁= 2.5m³ and V₄= 4.7m³. What is the temperature at step 4?

- 2.07 x 10² K

+ 6.56 x 10² K

- 2.07 x 10³ K

- 6.56 x 10³ K

- 2.07 x 10⁴ K