For the one-dimensional steel bar fixed at the left end, free at the right end, and subjected to a uniform temperature rise T = 100°F as shown in Figure P15 - 1, determine the free-end displacement, the displacement 60 in. from the fixed end, the reactions at the fixed end, and the axial stress. Let E = 30 × 106 psi, A = 4 in2, and a = 7.0 × 10-6 (in./in.)/°F.

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T = 100°F 120 in.