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
to change the momentum of the ball?
Answer: The impulse required to change the momentum of the ball is 8 kg m/s.
F = m dv/ dt
F dt = m dv = impulse or change of momentum
= 4.5 + 3.5 = 8