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QUESTION

An ice skater whirls with her arms and one leg stuck out as shown in the rst gure, making one complete turn in one second.

An ice skater whirls with her arms and one legstuck out as shown in the first figure, makingone complete turn in one second. Then shequickly moves her arms up above her head andpulls her leg in as shown in the second figure.In doing so, her moment of inertia about heraxis of rotation changes from 21 kg.m2to 10 kg.m2 What is the minimum amount of .chemical energy she must have used up indoing this? Take π=3.1416

An ice skater whirls with her arms and one legstuck out as shown in the first figure, makingone complete turn in one second. Then shequickly moves her arms up above her head andpulls her leg...
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