Joint Entrance Examination/2000 Screening/Q004 Roatting triangular frame with beads, what quantities are conserved

Welcome to the Highschool Help Forum!

The forum is currently in "Beta" stage of development. You can ask questions and answer/discuss them. The basic functionalities are present. What's required is a more aesthetic look to the Static pages and a more user friendly setup. This will happen over the time gradually as we start creating some content.

The site has a lot of tools, like posting mathematical calculations, images and diagrams; categorizing questions and so on. Having them here is NO GOOD unless you know how to use them. I am thoroughly against compiling a list of these features and then writing about them. As soon as you do not understand how to do something or use a certain feature, report that on "How To"s Section of the forum. Your queries will be answered there.

If you have any ideas/discussion regarding the site/comments, please go to Discussions regarding Highschool Help Forum

Lastly, thanks for joining in the site's development process! It matters!

Browse All Available Categories

Physics: Introductory PhysicsMechanicsHeatWaves and OscillationsElectricity And MagnetismOpticsModern Physics
Mathematics: AlgebraTrigonometryCo-Ordinate (Analytical) GeometryCalculusVectors And 3D GeometryMiscellaneous Topics
Chemistry: General Chemistry and Physical ChemistryOrganic ChemistryInorganic Chemistry
Biology: General BiologyAnatomyPhysiologyBotanyZoology
Nuvola apps edu miscellaneous.svg

Original Question by Dharav talk

Here's the question...

An equilateral triangle ABe formed from a uniform wire has two small identical beads initially located at A. The triangle is set rotating about the vertical axis AO. Then the beads are released from rest simultaneously and allowed to slide down; One along AB and the other along AC as shown. Neglecting frictional effects, the quantities that are conserved as beads slides down are

  • (A) angular velocity and total energy (kinetic and


  • (B) total angular rnomentum and total energy
  • (C) angular velocity and moment of inertia about the axis

of rotation

  • (D) total angular momentum and moment of inertia

about the axis of rotation. File:JEE2000ScreeningQ004.gif Posted by Dharav talk 11:28, 17 August 2009 (UTC)

Nuvola apps krfb.png

What's Up?

Latest discussions on the forum


  1. Joint Entrance Examination/AIEEE 2009/Q083 YOUNGS MODULUS
  2. Joint Entrance Examination/AIEEE 2009/Q087 ENERGY CONSERVATION
  3. HHF/Mechanics-Preload
  4. Joint Entrance Examination/2000 Screening/Q003 A tank with two holes, one square and another round
  5. Joint Entrance Examination/2000 Screening/Q005 Toppling vs Sliding of a cube


  1. User:Thewinster/Sandbox/Forum-Watch
  2. User:Thewinster/Sandbox
  3. Joint Entrance Examination/AIEEE 2009/Q084 work done by electrostatic field
  4. Joint Entrance Examination/2000 Screening/Q002 Uniform time varying magnetic field and induced electric field
  5. Joint Entrance Examination/2000 Screening/Q001 X Ray Tungsten filament and electrons

a a