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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

The moment of inertia of a body about given axis is 1.2 and it is at rest. An angular acceleration of 25 is applied to generate a K.E. of 1500 J in the body. The duration for which acceleration applied is:

Answer: (B)

Solution

gives rad/s and

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Question ID VK-040392