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Review. A string is wound around a uniform disk of radius

Physics for Scientists and Engineers with Modern Physics | 9th Edition | ISBN: 9781133954057 | Authors: Raymond A. Serway John W. Jewett ISBN: 9781133954057 230

Solution for problem 78 Chapter 10

Physics for Scientists and Engineers with Modern Physics | 9th Edition

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Physics for Scientists and Engineers with Modern Physics | 9th Edition | ISBN: 9781133954057 | Authors: Raymond A. Serway John W. Jewett

Physics for Scientists and Engineers with Modern Physics | 9th Edition

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Problem 78

Review. A string is wound around a uniform disk of radius R and mass M. The disk is released from rest with the string vertical and its top end tied to a fixed bar (Fig. P10.78). Show that (a) the tension in the string is one third of the weight of the disk, (b) the magnitude of the acceleration of the center of mass is 2g/3, and (c) the speed of the center of mass is (4gh/3)1/2 after the disk has descended through distance h. (d) Verify your answer to part (c) using the energy approach.

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 One more entropy problem: o Two boxes, of unequal size, have different amounts of energy. The box on the left has two packets of energy, and can contain 9. The one on the right has 3 packets and can contain 6 o If one packet of energy moves from the 6 to the 9, what is the change in entropy for : o • The 9­box o • The 6­box o • The system as a whole If, after one packet is moved from 6 9, another is moved (so that now the 6­box has only one packet), what is the change in entropy for: o • The 9­box o • The 6­box o • The system as a whole o What is the most likely final state Will you see this state every time How do the temper

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Chapter 10, Problem 78 is Solved
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Textbook: Physics for Scientists and Engineers with Modern Physics
Edition: 9
Author: Raymond A. Serway John W. Jewett
ISBN: 9781133954057

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Review. A string is wound around a uniform disk of radius