Question

Our hand hurts more when we hit the wall. Than when we hit the sponge seat of the car we do not hurt.Why?

Answer 1

the sponge compresses when we hit it. The impact time of the force is increased, and thus the force becomes less. but, in case of a wall, the impact time is very short (which is the amount of time the force is transferred for) because the wall is hard, and the force is more.

Answer 2

when we a sponge it compresses as it has air trapped in it so the time for action is increased which result in less force but when we hit a wall as we know it is solid so the time for action don't increase which result in more force.