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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

M.I. of a uniform disc about a central axis is 1 . It is rotating with an angular velocity of 100 rad/sec. Another identical disc is gently placed on it so that their centre coincides now these two move together with the same axis the loss in K.E. of rotation will be in joules:

Answer: (A)

Solution

rad/s, so kJ and

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Question ID VK-040383