A ball traveling with an initial momentum of 4.5kg m/s bounces off a wall and comes back in the opposite direction with a momentum of -3.5kg m/s. What is the impulse required

Answer 1

to change the momentum of the ball?

Answer: The impulse required to change the momentum of the ball is 8 kg m/s.

Answer 2

F = m dv/ dt
F dt = m dv = impulse or change of momentum
= 4.5 + 3.5 = 8