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First Law of Motion

An equilatera...

Question

An equilateral triangle $A B C$ formed from a uniform wire has two small identical beads initially located at $A$ . The triangle is set rotating about the vertical axis $A O$ . Then the beads are released from rest simultaneously and allowed to slide down, one along $A B$ and the other along $A C$ as shown. Neglecting frictional effects, the quantities that are conserved as the beads slide down are

A

Angular velocity and total energy (kinetic and potential)

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B

Total angular momentum and total energy

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C

Angular velocity and moment of inertia about the axis of rotation

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D

Total angular momentum and moment of inertia about the axis of rotation

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Solution

The correct option is B Total angular momentum and total energy

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