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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

A pulley of radius 2 m is rotated about its axis by a force newton (where is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is , the number of rotations made by the pulley before its direction of motion is reversed, is

Answer: (B)

Solution

. (from rest), which returns to zero at s.

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Question ID VK-159142