Asked by putman

A skate dancer spins about a vertical axis at
1rev/s with arms out Stretched.with her arms
folded,her moment of inertia about the
vertical axis decreased by 60%,Calculate the
rate of revolution...

Plz show step
Answered by Damon
Inew = .4*I

Inew * omega new = I omega

omega new = (I/.4I) * 1 rev/s

omega new = 1/.4 = 2.5 rev/s
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