For the bar hanging under its own weight shown in Figure P3-57, determine the nodal displacements using
(a) Two equal-length elements and
(b) Four equal-length elements. Let A = 2 in2, E = 30 × 106 psi, and weight density (w = 0.283 lb/in3. (The internal force is a function of x. Use the potential energy approach.)
Figure P3-57

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60 in.