Footballs P and Q of the same mass rebound from a wall and from the ground respectively (Fig e and f).

If their time of impact are equal, which of them experiences a larger force acted by the wall/ground?

Give the reasons.

 

 

sorry for the small pic.

Is the force something you can calculate?

That the times of impact are equal isn't useless information. Think impulse.

impulse yes
Ft=change in momentum
so the F=Change in momentum divided by time.i think.