Extra credit (5 points). Consider the mechanical system shown below. The massless bar AA' is displaced 0.05 m by a constant force of 100 N. Suppose that the system is at rest before the force is abruptly released. The time-response curve when the force is released at t = 0 is shown on the right. Determine the numerical values of b and k. F = 100 N 0.05 0.04 A A' www 0.03 E 0.02 0.01 0 10 15 20 25 30 time (s)