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Statement of a problem № 3244

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An ice skater spins at 4pi rad/s with her arms extended. (a) If her moment of inertia with arms folded is 80% of that with arms extended, what is her angular velocity when she folds her arms? (b) Find the fractional change in kinetic energy.

Solution:
An ice skater spins at 4pi rad/s with her arms extended. (a)  If her moment of i

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