Starting from rest, a disk rotates about its central axis with constant angular acceleration. In 10 s, it rotates 2 revolutions.
a. What was the angular acceleration during this time? Put your answer in rad/s2.
b. What is the instantaneous angular velocity of the disk at the end of the 10 s? Put your answer in rad/s.
c. If the moment of inertia of the disk is 0.5 kg?m2, what is the net torque on the disk?