MHT CET 2022 Physics question
A disc has mass 'm' and radius 'R'. How much tangential force should be applied to the rim of the disc so as to rotate with angular velocity '' in time t?
Answer: (A)
Solution
Starting from rest, . The moment of inertia of a disc about its axis is . The torque of the tangential force at the rim is , so \dfrac$12
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