A damped vibrating system has an undamped natural frequency of 10 Hz and a weight of 800 lb.

The damping ratio is 0.15. Using the phase-plane F = 2 000 lb F = 3 000 lb F = 1 000 lb F = –1 000 lb 0 0.02 0.04 0.06 0.08 t, s Figure P13.19 method, determine the response of the system to the given forcing function.