A grinding wheel is in the form of a uniform solid disk of radius 6.96 cm and mass 2.04 kg. It starts from rest and accelerates uniformly under the action of the constant torque of 0.610 N · m that the motor exerts on the wheel.
(a) How long does the wheel take to reach its final operating speed of 1 160 rev/min?
(b) Through how many revolutions does it turn while accelerating?