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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

A disc of mass 100 kg and radius 1 m is rotating at 300 rpm. The torque required to rotate the disc in opposite direction with same speed in time 50 second is [MHT-CET 2022, MHT-CET 2022]

Answer: (C)

Solution

rad/s, so the change in angular velocity (reversal) is and ;

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Question ID VK-040893