How do you find the Kinetic Energy of a person spinning on a chair with 2 equal weights on each arm?(adsbygoogle = window.adsbygoogle || []).push({});

A specific problem asks what the change in KE is if he moves his originally extended arms inward.

I tried doing (1/2)(I)(wf)^2 - (1/2)(I)(wi)^2 where wi is initial angular velocity and wf is final angular velocity, but its wrong.

Any help?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Finding Kinetic Energy of Person Spinning on Chair w/ Weights

**Physics Forums | Science Articles, Homework Help, Discussion**