A ballerina spins initially at 1.5 rev/s when her arms are extended. She then draws in her arms to her body and her moment of inertia becomes 0.88 kg ∙ m², and her angular speed increases to 4.0 rev/s. What was her initial moment of inertia?

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The Answer of A ballerina spins initially at 1.5 rev/s when her arms are extended. She then draws in her arms to her body and her moment of inertia becomes 0.88 kg ∙ m², and her angular speed increases to 4.0 rev/s. What was her initial moment of inertia?

A Ballerina Spins Initially at 1