A rigid steel bаr is suppоrted by three rоds, аs shоwn in the figure. There is no strаin in the rods before the load P is applied. After load P is applied, the normal strain in rod (2) is 1080 μin./in. Assume initial rod lengths of L1 = 50 in. and L2 = 156 in. Determine the normal strain in rod (1).
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