Rework Problems 16.7 and 16.8 using a computer program.
Refer to Problem 16.7 and 16.8,
1. For the bar shown in Figure P16-7, determine the nodal displacements, velocities, and accelerations for five time steps using two finite elements. Let E = 30 × 106 psi, ( = 0.00073 lb-s2 / in4, A = 1 in2, and L = 100 in. Use (t 5 2.5 × 10-4 s
Figure P16-7

2. For the bar shown in Figure P16 -8, determine the nodal displacements, velocities, and accelerations for five time steps using two finite elements. For simplicity of calculations, let E = 1 × 106 psi, ( = 1 lb-s2 /in4, A = 1 in2, and L = 100 in. Use Newmark's method and Wilson's method. Use (t = 0.05 s.
Figure P16-8

3 F() 2. F(t), Ib 5000 0.001 0.002