Determine the joint displacements, member axial forces, and support reactions for the plane truss shown in Fig. P7.28, due to a temperature drop of 100° F in member 2. Neglect the joint loads shown in...

Determine the joint displacements, member axial forces, and support reactions for the plane truss shown in Fig. P7.28, due to a temperature drop of 100° F in member 2. Neglect the joint loads shown in the figure. Use the matrix stiffness method; α = 6.5(10−6 )/° F.