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SPR2007 - EGM 3520 Exam 1 Spring 2007 NAME(Last First...

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EGM 3520 Exam 1 Spring 2007 NAME (Last, First) Section: 1585 or 1586 (circle one) SHOW YOUR WORK - BOX OR UNDERLINE ANSWERS Problem 1. (33 points total) A steel bar and two aluminum bars are firmly attached to the wall on the top and connected to a rigid plate at the bottom. A load P is applied at the center so that the rigid plate does not rotate. The cross-sectional areas and Young's moduli of the bars are given in the figure (as A 's and E 's). Calculate the vertical displacement of the rigid plate in terms of P, L, A, and E. Assume all bars remain linear elastic and ignore the gravity. 61 CAI k - - ~ + b 4 A D 2 b hY k "a : B CP, g E L I - - P , f A , + F s + c ~ l = ~ 5XJ - - p 2 5 L +G+ - - .^i+ .--- .-+I- - .- , , ri-i- - ‘,P -, ypigld.*/?,-- " " :-a : . ;- :" ."r ,-+". I - w - gLK
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EGM 3520 Exam 1 Spring 2007 NAME (L* First) Section: 1585 or 1586 (circle one) SHOW YOUR WORK - BOX OR UNDERLm AN$WERS
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