A uniform cylinder of mass m = 8.0 kg and radius R = 1.3 cm (Fig.1.60) starts

Question:

A uniform cylinder of mass m = 8.0 kg and radius R = 1.3 cm (Fig.1.60) starts descending at a moment t = 0 due to gravity. Neglecting the mass of the thread, find:
(a) The tension of each thread and the angular acceleration of the cylinder;
(b) The time dependence of the instantaneous power developed by the gravitational force.