An 8 kg cylinder, having an initial downward velocity of 0. 5 m/s, is held by a cord connected to a grooved drum whose mass is 12 kg. The drum has an outer radius ro 300 mm, an inner radius of η = 200 mm, and a mass moment of inertia of 0. 75 kg·m 2 about its center of gravity O. If the drum has a constant frictional moment of 4 N. M at O, what is the cylinder's speed after dropping 1. 5 meters from its initial position?
