Lets say there is a rigid metal box. It is 1meter wide, 2meters long and an undetermined height. The thickness of the box's metal walls are also undetermined. The entire box weighs 2 metric tons. There is a person lying face down or face up in this box, and inside the box, the bottom and top of the box is covered in springs. The human weighs 88kg If the box is dropped from a cliff, assuming the box lands with its largest side hitting the ground, how high can the cliff be without the human inside sustaining injury? M - metal S - spring P - padding (so the springs don't pierce the human) H - human MMMMM SSSSS PPPPP HHHHH PPPPP SSSSS MMMMM This is just a basic model to give me an introduction to calculating springs as a cushioning device. I learn the fastest when i have an example i can dissect so a simple example would be greatly appreciated. I plan on picking random springs I can acquire and calculate all of them to see which one is best for my purposes.