The rigid bars AB and CD are supported by pins at A and D. The vertical rods are made of aluminum and bronze. Determine the vertical displacement of the point where the force P = 10 kips is applied. Neglect the weights of the members. A Aluminum L=3 ft A=0.75 in 2 E = 10 x 106 psi 2ft 3 ft- C B Bronze L=4 ft A = 0.25 in. E = 12 106 psi P 2 ft 2 ft FIG. P2.23 D