A grinding wheel is in the form of a uniform solid disk of radius 6.95 centimeter and mass 1.95 kilogram. It starts from rest and accelerates uniformly under the action of the constant torque of 0.598 N•m that the motor exerts on the wheel.
(a) Find how long does the wheel take to reach its final operating speed of 1270rev/min?
s
(b) Find through how many revolutions does it turn while accelerating?
rev