In your episode on moment of inertia you answered the question of the solid cylinder reaching down in terms of kinetic energy. Can it also be explained as follows? "The moment of inertia os the solid cylinder is smaller. Since theer is no external torque,when moment of inertia decreases the angular velocity must increase inorder to satisfy the conservation of momentum principle. Thus, the solid cylinder has a larger angular velocity and thus reaches down faster." Is this explanation correct? If not please give me the correct reason.

Asked by Jaziya | 27th Nov, 2010, 12:00: AM

Expert Answer:

This explanation is not correct sice the moment of inertia of any object about a particular axis remains constant.

Answered by  | 29th Nov, 2010, 10:55: AM

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