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Engineering and Tech / Engineering Mechanics: Statics 14 / Chapter 8 / Problem 8-21

Engineering Mechanics: Statics | 14th Edition | ISBN: 9780133918922 | Authors: Russell C. Hibbeler

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Solved: A man attempts to support a stack of books

Chapter 8, Problem 8-21

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QUESTION:

A man attempts to support a stack of books horizontally by applying a compressive force of F = 120 N to the ends of the stack with his hands. If each book has a mass of 0.95 kg, determine the greatest number of books that can be supported in the stack. The coefficient of static friction between his hands and a book is \(\left(\mu_{s}\right)_{h}=0.6\) and between any two books \(\left(\mu_{s}\right)_{b}=0.4\).

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QUESTION:

A man attempts to support a stack of books horizontally by applying a compressive force of F = 120 N to the ends of the stack with his hands. If each book has a mass of 0.95 kg, determine the greatest number of books that can be supported in the stack. The coefficient of static friction between his hands and a book is \(\left(\mu_{s}\right)_{h}=0.6\) and between any two books \(\left(\mu_{s}\right)_{b}=0.4\).

ANSWER:

Step 1 of 3

Force applied, .

Mass of each book, .

Static friction between hand and book is

Static friction between any two book is

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