Suppose that you are standing on a cardboard carton that just barely supports you.What would happen to it if you jumped up into the air?
It would spring upward a bit.
It would move sideways.
It would be unaffected.
It would collapse.
1 answer
It would collapse, because you have to exert a downward force to go up. By pushing down on the cardboard that barely holds you, it will probably collapse.
5 answers