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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

A flywheel of M.I. is rotated steadily at 120 rad/s by a 50 W electric motor. The value of the frictional couple opposing rotation is

Answer: (B)

Solution

At steady speed the motor torque equals the frictional couple:

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Question ID VK-040426