No, you still have not understood it; what i am pointing out is a change in momentum after a collision resulting in the Impulsive Force. See the Khan Academy v

No, you still have not understood it; what i am pointing out is a change in momentum after a collision resulting in the Impulsive Force. See the Khan Academy video i linked for a detailed example with numerical calculations; It walks you through the steps involved. Also from my 2nd linked article; Observe that each of the collisions above involve the rebound of a ball off a wall. Observe that the greater the rebound effect, the greater the acceleration, momentum change, and impulse. A rebound is a special type of collision involving a direction change in addition to a speed change. The result of the direction change is a large velocity change.