The plane truss shown in Figure P3.10 is subjected to a downward vertical load at node 2. Determine.

The plane truss shown in Figure P3.10 is subjected to a
downward vertical load at node 2. Determine via the direct stiffness method the
deflection of node 2 in the global coordinate system specified and the axial
stress in each element. For both elements, A = 0.5 in.2 , E = 30 × 106 psi.