Question: 1. Determine the value of the force P that must be applied to joint C of the truss in Figure P8.7 if the vertical deflection at C is to be zero. The area of all bars = 1.8 in.2, and E = 30,000 kips/in.2.
2. When the truss in Figure P8.8 is loaded, the support at E displaces 0.6 in. vertically downward and the support at A moves 0.4 in. to the right. Compute the horizontal and vertical components of displacement of joint C. For all bars the area = 2 in.2, and E = 29,000 kips/in.2.
