The angular momentum of a flywheel having a rotational inertia of `0.140kg*m^(2)` about its central axis decreases from 3.00 to `0.800kg*m^(2)//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?

Explanation

(a) `1.47N*m`, (b) 20.4 rad, ( c) -29.9 J, (d) 19.9 W