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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

A ring and a disc of different masses are rotating with the same kinetic energy. If we apply a retarding torque on the ring and it stops after making n revolutions, then in how many revolutions will the disc stop under the same retarding torque?

Answer: (A)

Solution

By the work-energy theorem ; the kinetic energy and torque are the same for both bodies, so the

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Question ID VK-040524