Divide the axially loaded rod (Figure 1.15) into three elements of equal length. (a) Form the global

Divide the axially loaded rod (Figure 1.15) into three
elements of equal length.

(a) Form the global stiffness matrix, the global mass
matrix, and the global force matrix.

(b) Apply the boundary conditions and determine the
reduced set of equations to be solved for displacements, but do not solve the
resulting set of equations.