# Rotational Dynamics and Net Torque

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A 10 kg solid disk of radius 0.50 m is rotated about an axis through its center. If the disk accelerates from rest to an angular speed of 3.0 rad/s while rotating 2.0 revolutions, what net torque is required?

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#### Solution Preview

2 revs = 2*6.28 rad = 12.56 rad

First calculate angular acceleration:

v^2 = v0^2 + ...

#### Solution Summary

This solution is provided in 69 words. It uses revolutions to calculate radius, and then calculates angular acceleration and torque.

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