Question: The angular momentum of a flywheel having a rotational inertia of 0.140 kg m2 about its central axis decreases from 3.00 to 0.800 kg m2/s

The angular momentum of a flywheel having a rotational inertia of 0.140 kg ∙ m2 about its central axis decreases from 3.00 to 0.800 kg ∙ m2/s in 1.50 s.
(a) What is the magnitude of the average torque acting on the flywheel about its central axis during this period?
(b) Assuming a constant angular acceleration, through what angle does the flywheel turn?
(c) How much work is done on the wheel?
(d) What is the average power of the flywheel?

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