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COSMOS: Complete Online Solutions Manual Organization System 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. Chapter 10, Solution 1. Link ABC: Assume δθ clockwise Then, for point C ( ) 125 mm C x δ δθ = and for point D ( ) 125 mm D C x x δ δ δθ = = and for point E 250 mm 2 375 mm 3 E D D x x x δ δ δ = = Link DEFG: ( ) 375 mm D x δ δφ = Thus ( ) ( ) 125 mm 375 mm δθ δφ = 1 3 δφ δθ = Then ( ) 100 100 2 mm 2 mm 3 G δ δφ δθ = = 100 100 cos 45 2 mm cos 45 mm 3 3 G G y δ δ δθ δθ = °= °= Virtual Work: Assume P acts downward at G 0: U δ = ( ) ( )( ) ( ) 9000 N mm 180 N mm mm 0 E G x P y δθ δ δ + = 2 100 9000 180 125 0 3 3 P δθ δθ δθ × + = or 180.0 N = P
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Solucionario Mecánica Vectorial para Ingenieros - Estatica ( Beer ) 8edicion capitulo 10

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• 1.COSMOS: Complete Online Solutions Manual Organization System 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. Chapter 10, Solution 1. Link ABC: Assume clockwise Then, for point C ( )125 mmCx = and for point D ( )125 mmD Cx x = = and for point E 250 mm 2 375 mm 3 E D Dx x x = = Link DEFG: ( )375 mmDx = Thus ( ) ( )125 mm 375 mm = 1 3 = Then ( ) 100 100 2 mm 2 mm 3 G = = 100 100 cos45 2 mm cos45 mm 3 3 G Gy = = = Virtual Work: Assume P acts downward at G 0:U = ( ) ( )( ) ( )9000 N mm 180 N mm mm 0E Gx P y + = 2 100 9000 180 125 0 3 3 P + = or 180.0 N=P