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

2019
Views:

193

Pages:

1
Author:

Arielle Armstrong

COSMOS: Complete Online Solutions Manual Organization System Chapter 8, Solution 73. FBD lower jaw: By symmetry B = 540 N ΣFy = 0: − 540 N + A − 540 N = 0, A = 1080 N since A > B, A should be adjusted first when no force is required. If instead, B is adjusted first, Block/incline at A: θ = tan −1 4 mm = 6.0566° 12π mm φ s = tan −1 µ s = tan −1 ( 0.35) = 19.2900° Q = (1080 N ) tan 25.3466° = 511.59 N Couple = rQ = ( 6 mm )( 511.59 N ) = 3069.5 N ⋅ mm M = 3.07 N ⋅ m Note that this is twice that required if A is adjusted first. 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.

COSMOS Chapter 8 Solution 73

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