a 60 kg student jumps from a table 1.2m high. When his feet hit the floor he bends his knees so that the stopping time is .06s. What is the average force that the floor exerts on his body in order to stop him?

Question

a 60 kg student jumps from a table 1.2m high.  When his feet hit the floor he bends his knees so that the stopping time is .06s. What is the average force that the floor exerts on his body in order to stop him?

bobpursley · Answer

mgh=1/2 m v^2 velocity at impact= sqrt (2gh) force*time= mass*velocity solve for force