Four persons, each with a mass of 73.1 kilogram, are in a van with a mass of 1150 kilogram. An earthquake strikes. The driver manages to pull off the road and stop, as the vertical oscillations of the ground surface make the car bounce up and down on its suspension springs. When the frequency of the shaking is 1.60 Hertz, the car exhibits maximum amplitude of vibration. The earthquake ends and the four people leave the car as fast as they can. Find by what distance does the car undamaged suspension lifts the car body as the people get out?
cm