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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

A hollow sphere of radius 30 cm is released from rest on a rough inclined plane. The friction is enough to prevent any slipping. Find the angular velocity (in rad/s) of the sphere when it descends through a vertical height of 3 cm.

Answer: 2

Solution

For a rolling hollow sphere (), energy conservation gives

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Question ID VK-158861