Power · AP Physics C Mechanics

AP Physics C Mechanics Quiz

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WORK, ENERGY, AND POWER

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A flywheel is driven so that its angular speed increases uniformly from

10.0\,\text{rad/s}

30.0\,\text{rad/s}

4.0\,\text{s}

while the applied torque remains constant at

8.0\,\text{N}\cdot\text{m}

. Assume friction is negligible and the torque is always in the direction of rotation. The instantaneous rotational power is

P=\tau\omega

, so average power over the interval can be found using the average angular speed. Use SI units throughout. In the given system, what is the average power output of the system described?

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