16. Angular Momentum
Opening/Closing Arms on Rotating Stool
10:40 minutes
Problem 11.15
Textbook Question
Textbook Question(II) Model a figure skater’s body (mass M) as a solid cylinder ( ≈ 0.75 M including head and thighs) and her arms as thin rods ( 0.13 M for both), making reasonable estimates for the dimensions. Then calculate the ratio of the angular speeds for a spinning skater with outstretched arms, and with arms held tightly against her body. (Ignore contributions from lower legs and feet.)
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