16. The truss structure shown in the figure supports force F at Node 2. FEM is used to analyze this structure using two truss elements as shown.

iz, cl c

(a) Compute the transformation matrix for Elements 1 and 2.

(b) Compute the element stiffness matrices for both elements in the global coordinate system.

(c) Assemble the element stiffness matrices and force vectors to structural matrix equation

[KJ{Q,.}= {Ff} before applying boundary conditions.

(d) Solve the FE equation after applying the boundary conditions. Write nodal displacements in the global coordinates.

(e) Compute the stress in the Element 1. Is it tensile or compressive?