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Physics

Mechanics

Easy

Question

An equilateral triangle ABC formed 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 other AC as shown. Neglecting frictional effects, the quantities that are conserved as beads slides down are:

angular velocity and total energy (kinetic and potential)
total angular momentum and moment of inertia about the axis of rotation
angular velocity and moment of inertia about the axis of rotation
total angular momentum and total energy

The correct answer is: total angular momentum and total energy

$text Hear force is conservative end text open parentheses F subscript z close parentheses text . Thus energy is conserved. \& No external torqued. end text L with not stretchy rightwards arrow on top equals text constant end text$

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