University Physics with Modern Physics (14th Edition)
14th Edition
ISBN: 9780321973610
Author: Hugh D. Young, Roger A. Freedman
Publisher: PEARSON
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Chapter 10, Problem 10.56P
A uniform, 8.40-kg, spherical shell 50.0 cm in diameter has four small 2.00-kg masses attached to its outer surface and equally spaced around it. This combination is spinning about an axis running through the center of the sphere and two of the small masses (Fig. P10.56). What friction torque is needed to reduce its angular speed from 75.0 rpm to 50.0 rpm in 30.0 s?
Figure P10.56
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University Physics with Modern Physics (14th Edition)
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