Explain why it is usually safe for a person standing on the seat of a chair to jump horizontally and land on the floor, but not for a person standing on the roof of a tall building to jump horizontally and land on the ground.

Question

kropot72 · Answer

What is the vertical force acting on the person in each case? Also estimate the distance between the seat of the chair and the floor, and the typical distance from the roof of a tall building to the ground.