A flywheel of mass 189 kg has an effective radius of 0.61 m (assume the mass is concentrated along a circumference located at the effective radius of the flywheel).
(a) How much work is done to bring this wheel from rest to a speed of 120 rpm in a time interval of 29.8 s?
kJ
(b) What is the applied torque on the flywheel (assumed constant)?
N · m