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Question: 8 a steel bar ad has a crosssectional area of...

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8. A steel bar AD has a cross-sectional area of 0.40 in? and is loaded by forces P 2700 lb, P2 1800 lb, and Ps 1300 lb. The length of the segments of the bar are a 60 in, b 24 in, and c 36 in. Assuming that E-30 x 10° psi, calculate the change in length o of the bar. Does the bar elongate or shorten?
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