F16-1. When the gear rotates 20 revolutions, it achieves an angular velocity of v = 30 rad>s, starting from rest. Determine its constant angular acceleration and the time required.
F16-4. The bucket is hoisted by the rope that wraps around a drum wheel. If the angular displacement of the wheel is u = (0.5t3 + 15t) rad, where t is in seconds, determine the velocity and acceleration of the bucket when t = 3 s.
