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

1. Remove part 1 from Figure P3–30 and clear-up the collection. Compare the displacements and stresses to the results for Collection 3.30.

2. For the roll truss shown in Figure P3–32, indicate the nodal displacements, the part validitys and stresses, and the support reactions. All parts own E = 70 GPa and A = 3:0 104 m2. Verify validity makeweight at nodes 2 and 4. Use interrelation in your design.