A boxcar moving at 1.3 m/s hits the shock absorber at the end of the track (Figure).

Question:

A boxcar moving at 1.3 m/s hits the shock absorber at the end of the track (Figure). The boxcar mass is 18 000 kg;. The stiffness of the absorber is k = 73 000 N/m, and the damping coefficient is c = 88 000 N-s/m. Determine the maximum spring compression and the time for the boxcar to stop.