The angular momentum of a flywheel having a rotational inertiaof 0.200 kg·m 2 ab

Question

The angular momentum of a flywheel having a rotational inertiaof 0.200 kg·m2 about itscentral axis decreases from 3.20 to 1.200 kg·m2/sin 1.60 s. (a) What is the magnitude of the average torque acting on theflywheel about its central axis during this period?
N·m

(b) Assuming a uniform angular acceleration, through what angledoes the flywheel turn?
rad

(c) How much work is done on the wheel?
J

(d) What is the average power of the flywheel?
W (a) What is the magnitude of the average torque acting on theflywheel about its central axis during this period?
N·m

(b) Assuming a uniform angular acceleration, through what angledoes the flywheel turn?
rad

(c) How much work is done on the wheel?
J

(d) What is the average power of the flywheel?
W

Explanation / Answer

Rotational inertia I = 0.2 kg m^ 2

Initial angular momentum L = 3.2 kg m^ 2/ s

Final angular momentum L ‘ = 1.2 kg m^ 2/ s

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