- #1

Seraph404

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## Homework Statement

The angular momentum of a flywheel having a rotational inertia of 0.140 kg m[tex]^{2}[/tex] about its central axis decreases from 3.00 to 0.800 kg m[tex]^{2}[/tex]/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?

## Homework Equations

[tex]\tau[/tex] = I[tex]\alpha[/tex] ?

## The Attempt at a Solution

a) Part a is easy. Torque equals final momentum minus initial momentum over the time. The answer is -1.47 N

b) Part b is what I need help with. As a hint, what equations should I look at or try to combine?

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