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


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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

potential)

  • (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)


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