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Hi - I've got my own answer to the question below but would like expert opinion please ? Many Thanks A skater is spinning about

Hi -

I've got my own answer to the question below but would like expert opinion please ?

Many Thanks

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A skater is spinning about a fixed symmetrical vertical axis. When she lifts her arms above her head, her moment of inertia about this axis of rotation drops from 12.0 kg m2 to 8.00 kg 1112. What is the ratio of her final rotational energy and her initial rotational energy? final rotational kinetic energy initial rotational kinetic energy _

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