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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

A rotating disc of mass and radius is brought to rest on its flat surface, which has a coefficient of kinetic friction with floor as . If it is in pure rotation about its central axis oriented vertically, the magnitude of angular deceleration is

Answer: (C)

Solution

The friction torque is and , so \frac{τ}{I}$ =

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Question ID VK-040596