1. A uniform disk of mass M = 5.00 kg andradius r = 24.0 cm is mounted on a motor throughits center. The motor accelerates the disk uniformly from rest byexerting a constant torque of 1.50 N · m.
(a) What is the time required for the disk to reach an angularspeed of 8.50 ✕ 102 rpm?
(b) What is the number of revolutions through which the diskspins before reaching this angular speed?
2. A thin, hollow sphere of mass 1.60 kg and radius 0.560 m isrolling on a horizontal surface with a constant angular speed of61.0 rpm. Find the total kinetic energy of the sphere.
