# Wright State University Lake Campus/2019-1/Phy2400/Notes

### Week 1

1/14 (M): Class cancelled

1/15 (T): lab did to end of 2 b velocityAcceleration Now lets look at equation sheet:

1/16 (W):Did the first three units in the OER slides, finishing,

C:File:MUPHYS1 02 Vectors (Module Overview).pdf

1/17 (R): following Tuesday:

• lab did to end of 2 b velocityAcceleration
• Now lets look at equation sheet:

### Week 2

MLK off 1/21(M)

1/23 (W): Mt Kilauea problem uses quadratic equation: https://cnx.org/contents/95euk-LY@1.143:aQYvRFbS@14/Projectile-Motion

### MIT free body diagrams

1/29 (T): free-body-diagrams (ocw.mit.edu)

Rest of week cancelled due to weather

### Week 4

#### 2/5 (T)

Today we will try to develop test questions.

1. Available on most campus computers (including our little lab laptops)
##### Next we need to get Python files to improve
1. From the aforementioned wiki Click Source to get to:
2. Source Look in OSUP-1-5-unfinished to get chapter 5 questions. We begin with problem 33 at:
3. up1-5-33 Use the 3 dots and open raw to get to:
4. a python file you can save
##### Latex

If you have Windows and are willing to waste a lot of time download Miktex at: https://miktex.org/. But it is far simpler to upload the question only (after deleting the \ifkey footnote):

1. https://latexbase.com seems to work, at least for now.
2. I have no experience with https://www.overleaf.com/user/subscription/plans

W: Mit labs and meeting

### Week 5: T2 study guide

2?/4 from 1411605 to a04DynForce Newton_sled (solutions)
3?/5 from 1411613 to a04DynForce Newton_tensions (solutions)
2?/4 from 1411601 to a04DynForce Newton_forces (solutions)
3?/5 from 1417994 to a05frictDragElast_3rdLaw (solutions)
3?/5 from 1418007 to a06uniformCircMotGravitation_friction (solutions)
2?/14 from 1411691 to a06uniformCircMotGravitation_proof (solutions)

#### 2/11 (M)

1411605 to a04DynForce Newton_sled (solutions)
1411613 to a04DynForce Newton_tensions (solutions)
1411601 to a04DynForce Newton_forces (solutions)

#### 2/12 (T)

Lab: Chapter 6#45 w python, attempted #61

#### 2/13 (W)

Recitation: Discussed Friction, Problem 6.61 (rapeller), and chapter 6 slides Lecture: Study guide.

##### ideas for Lecture

2?/4 from 1411601 to a04DynForce Newton_forces (solutions)
3?/5 from 1417994 to a05frictDragElast_3rdLaw (solutions)
3?/5 from 1418007 to a06uniformCircMotGravitation_friction (solutions)

### Week 6 Doing... T2?

I think we should postpone this test till a week from Monday.

Recitation:

Lecture:

### Week 7

#### Differentials and energy conservation

Note dot product:

${\displaystyle F_{x}dx=mv_{x}dv_{x}={\tfrac {m}{2}}dv_{x}^{2}=d\left({\tfrac {1}{2}}mv_{x}^{2}\right)}$
${\displaystyle F_{y}dy=mv_{x}dy_{y}={\tfrac {m}{2}}dv_{y}^{2}=d\left({\tfrac {1}{2}}mv_{y}^{2}\right)}$

${\displaystyle F_{x}dx+F_{y}dy={\tfrac {m}{2}}d\left(v_{x}^{2}+v_{y}^{2}\right)}$

In vector notation:

${\displaystyle {\vec {F}}\cdot d{\vec {r}}={\tfrac {m}{2}}d({\vec {v}}\cdot {\vec {v}})=d\left({\tfrac {1}{2}}mv^{2}\right)}$

#### 2/26 (T)

Today:

1. Get Matlab working
2. Visit Wright_State_University_Lake_Campus/2019-1/Matlab#CSVmaker
3. Be able to save a file or upload to Pilot

#### 2/27 (W)

Energy-cart1. Got into momentum and mentioned center of mass.

### Week 8:Spring Break

Spring break 3/4(M)-3/9(S)

### Week 9

#### 3/13 (W)

For reference only: using differentials to calculate a cone's moment of inertia

#### 3/14 (R)

Lab: Integral as (Riemann) sum to get area of circle. Scripts/codes to solve problems in http://mrlawsonscience.weebly.com/uploads/1/0/9/5/10954375/unit_6_-_worksheet_-_6.5_-_torque_rotational_inertia_angular_momentum_and_kinetic_energy.docx

### Week 10

#### 3/18 (M) Quiz Planned

Today we did: Question 3 from 1418173 to a08linearMomentumCollisions (solutions)
Question 1 from 1418177 to a09staticsTorques_torque (solutions)

#### 3/19 (T)

1. Signup for Symposium poster on writing numerical quizzes.
2. Heat engine practice

### Week 12 Test 3 on Monday!!!

#### 4/1 (M) T3 is today

1/3 from 1380215 to a07energy_cart1 (solutions)
1/3 from 1380821 to a07energy_cart2 (solutions)
1/3 from 1418173 to a08linearMomentumCollisions (solutions)
2/5 from 1418177 to a09staticsTorques_torque (solutions)
1/4 from 1412312 to a10rotationalMotionAngMom_dynamics (solutions)
1/4 from 1412355 to a11fluidStatics_buoyantForce (solutions)
1/4 from 1381800 to c07energy_lineIntegral (solutions)

____

Contrasts:

### Week 14 Doing... T4?

#### 4/17 (W)

1/4 from 1412312 to a10rotationalMotionAngMom_dynamics (solutions)
1/4 from 1412355 to a11fluidStatics_buoyantForce (solutions)
1/4 from 1381800 to c07energy_lineIntegral (solutions)

Not yet:

Friday: Start equation sheet!!!!

### Week 15

Last day of classes is 4/27(S)

#### 4/22 (M)

• Summer school: Try to enroll before Friday.
• Pick up formula sheet. Today we try and establish it as official.
• Tues/Thurs will problem solvins seesions. Attendance "required".
• Wed

#### 4/23 (T)

Informal lab report: Find the acceleration of an object sliding down an inclined plane with angle θ for an object of mass m that has a kinetic coefficient of friction of μ. Explain your free body diagram with two sketches, showing first a rotated coordinate system, and second, a modified version that splits gravity into two components.

Final Exams

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