Rotational kinetic energy:

$\overline{){\mathbf{K}}{\mathbf{.}}{{\mathbf{E}}}_{{\mathbf{rot}}}{\mathbf{=}}\frac{\mathbf{1}}{\mathbf{2}}{\mathit{I}}{{\mathbf{\omega}}}^{{\mathbf{2}}}}$

The ratio of initial to final rotational kinetic energy:

If a rotating skater triples her rate of rotation by decreasing her moment of inertia by 1/3, by what factor does her rotational kinetic energy change?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Intro to Rotational Kinetic Energy concept. You can view video lessons to learn Intro to Rotational Kinetic Energy. Or if you need more Intro to Rotational Kinetic Energy practice, you can also practice Intro to Rotational Kinetic Energy practice problems.