The pin-connected assembly consists of aluminum rods (1) and (2) and steel rod (3). The aluminum rods each have a diameter of 11 mm and an elastic modulus of E = 63 GPa. The steel rod has a diameter of 15 mm and an elastic modulus of E= 195 GPa. Assume a = 4.0 m, b = 1.5 m, and c = 0.9 m. What is the magnitude of load P that is necessary to displace point A 12 mm to the left? a Answer: P = i (3) B D KN

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