A Bus Is Designed to Draw Its Power from a Rotating

Multiple Choice

A bus is designed to draw its power from a rotating flywheel that is brought up to its maximum speed (3 000 rpm) by an electric motor.The flywheel is a solid cylinder of mass 500 kg and radius 0.500 m (I_cylinder = MR²/2) .If the bus requires an average power of 10.0 kW,how long will the flywheel rotate?

A) 154 s
B) 308 s
C) 463 s
D) 617 s