Newton’s Second Law for Rotation (Problem 88)

A torque of 50.0 N-m is applied to a grinding wheel ($I=20.0{\text{kg-m}}^2$) for 20 s. (a) If it starts from rest, what is the angular velocity of the grinding wheel after the torque is removed? (b) Through what angle does the wheel move while the torque is applied? Select the answer to part (a).