Question

The instant before a squishy ball of mass meets a horizontal floor and comes to rest in time ?t it has momentum p = p0 (ˆi −ˆj ) .What average force does the floor exert on the ball in order to stop it during this time interval?
bobpursley
it is in magnitude twice momentum, however, not knowing the rebound angle, I don't know which direction (i,r) reverses.
aida
po/t (j-i)