COSMOS Chapter 8 Solution 22 | Answer Key - Edubirdie

University:
Michigan State University
Course:
ERG 160 | Success in Science, Technology, Engineering, and Mathematics
Academic year:

2020
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118

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1
Author:

Tyshawn Shaffer

COSMOS: Complete Online Solutions Manual Organization System Chapter 8, Solution 22. FBD ladder: Slip impends at both A and B, FA = µ s N A , FB = µ s N B ΣFx = 0: ΣFy = 0: FA − N B = 0, N B = FA = µ s N A N A − W + FB = 0, N A + FB = W N A + µs N B = W ( ) N A 1 + µ s2 = W ΣM O = 0: ( 6 m ) N B +  5  5  m W −  m  N A = 0 4   2  6µ s N A + µ s2 + ( ) 5 5 N A 1 + µ s2 − N A = 0 4 2 24 µs − 1 = 0 5 µ s = − 2.4 ± 2.6 Vector Mechanics for Engineers: Statics and Dynamics, 8/e, Ferdinand P. Beer, E. Russell Johnston, Jr., Elliot R. Eisenberg, William E. Clausen, David Mazurek, Phillip J. Cornwell © 2007 The McGraw-Hill Companies. µ s min = 0.200

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