Question: A light non-stretchable thread is wound on a massive fixed pulley of radius R. A small body of mass m is tied to the free

A light non-stretchable thread is wound on a massive fixed pulley of radius R. A small body of mass m is tied to the free end of the thread. At a moment t = 0 the system is released and starts moving. Find its angular momentum relative to the pulley axle as a function of time t.

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Engineering Mechanics Dynamics 8th Edition by James L. Meriam, L. G. Kraige, J. N. Bolton