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September 22, 2014

Homework Help: Physics Urgent please help

Posted by rosa on Monday, November 11, 2013 at 11:22pm.

A figure skater stands on one spot on the ice(assumed frictionless) and spins around with her arms extended. When she pulls in her arms, her moment of inertia decreases to 3/4 of the initial value. Assume that her spin angular momentum is conserved. What is the ratio of her final rotational kinetic energy to her initial rotational kinetic energy?

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