[ANSWERED] 1. Remove element 1 from Figure P3–30 and solve the problem. Compare the displacements and stresses.

1. Remove element 1 from Figure P3–30 and solve the problem.
Compare the displacements and stresses to the results for Problem 3.30.
2. For the plane truss shown in Figure P3–32, determine the
nodal displacements, the element forces and stresses, and the support
reactions. All elements have E = 70 GPa and A = 3:0 10
4
m
2
.
Verify force equilibrium at nodes 2 and 4. Use symmetry in your model.