Problem 107 A rod is composed of an aluminum section rigidly attached between steel and bronze sections, as shown in Fig. P-107. Axial loads are applied at the positions indicated. If P = 3000 lb and the cross sectional area of the rod is 0.5 in², determine the stress in each section. 4P Steel Bronze Aluminum P 2 ft 4 3ft 2.5 ft Figure P-107