(idea) by ariels Mon Apr 16 2001 at 14:15:00
Legs outstretched, spin yourself around in an office chair (better yet, get someone else to spin you around). Now pull your legs in.

Your rotational speed goes way up!

Angular velocity isn't conserved; what's conserved is angular momentum. By pulling your legs in, you better compress yourself about your axis of rotation; angular velocity has to go up to compensate.

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