[ANSWERED] 1. Determine the energy equivalent nodal forces for the axial distributed loading shown acting on…

1. Determine the energy equivalent nodal forces for the
axial distributed loading shown acting on the bar elements in Figure P3–58.
2. Solve Problem 3.55 for the axial displacement in the bar
using collocation, subdomain, least squares, and Galerkin’s methods. Choose a
quadratic polynomial u(x) = c
1
x + c
2
x
2
in each
method. Compare these weighted residual method solutions to the exact solution.