COSMOS Chapter 6 Solution 67 - Edubirdie

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

2021
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96

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1
Author:

Dixie Summers

COSMOS: Complete Online Solutions Manual Organization System Chapter 6, Solution 67 FBD Truss: ( 32 ft ) H y − ( 24 ft )(12 kips ) − (16 ft )( 9 kips ) ΣM A = 0: − ( 8 ft )( 6 kips ) = 0, ΣFy = 0: H y = 15 kips Ay − 6 kips − 9 kips − 12 kips + 15 kips = 0 A y = 12 kips ΣFx = 0: FBD Section ABC: Ax = 0 Since only BE can provide the downward force necessary for equilibrium, it must be in tension, so CD is slack, FCD = 0 ΣFy = 0: 12 kips − 6 kips − 3 FBE = 0 5 FBE = 10.00 kips T ! Since only EF can provide the downward force necessary for equilibrium, it must be in tension, so DG is slack, FDG = 0 FBD Section FGH: ΣFy = 0: 15 kips − 12 kips − 3 FEF = 0 5 FEF = 5.00 kips T ! Knowing that FCD = FDF = 0, inspection of joint D gives FDE = 0 ! 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.

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