60_Problem CHAPTER 10

60_Problem CHAPTER 10 - PROBLEM 10.54 Using the method of...

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Unformatted text preview: PROBLEM 10.54 Using the method of virtual work, determine the reaction at D. SOLUTION Consider an upward displacement yE of pin E. CDE: yD 1 ft = yE 3.5 ft 1 E 3.5 or EFG: yD = yE 0.8 ft = yG 1.2 ft or Virtual Work: yG = 1.5 yE U = 0: D yD + 60 yG = 0 or or 1 D yE + ( 60 lb )(1.5 yE ) = 0 3.5 D = 315 lb ...
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