The rigid beam AD in Fig. P3.5-11 is supported by a smooth pin at D and by vertical steel rods attached to the beam at points A and C. Neglect the weight of the beam, and assume that the support rods are stress-free when P = 0. (a) Solve for the forces F1 and F2 in the support rods after load P is applied, and (b) determine the corresponding elongation of support rod (1). Assume that the rotation of the beam is very small, so e1≪ L1.


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