16. Angular Momentum
Opening/Closing Arms on Rotating Stool
8:03 minutes
Problem 11.6
Textbook Question
Textbook Question(II) A person stands, hands at his side, on a platform that is rotating at a rate of 0.80 rev/s. If he raises his arms to a horizontal position, Fig. 11–31, the speed of rotation decreases to 0.60 rev/s .
(a) Why?
(b) By what factor has his moment of inertia changed?
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