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January 31, 2015

January 31, 2015

Posted by **Maa** on Saturday, December 4, 2010 at 8:46am.

- physics -
**drwls**, Saturday, December 4, 2010 at 10:16amAngular acceleration = Torque/(moment of inertia)

The moment of inertia is (1/2) M R^2 for a disk.

After 10 seconds, the number of radians turned is

theta = (1/2)(angular acceleration)*(10 s)^2

Divide that by 2 pi for the number of revolutions.

Rotational work done is (torque)*(theta)

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