Question

A ball traveling with an initial momentum of 4.5 kgm/s bounces off a wall and comes back in the opposite direction with a momentum of –3.5 kgm/s. What is the change in momentum?

Answer:
-3.5-4.5=
-8 kgm/s?

Answer 1

looks good

Answer 2

Is the impulse also -8 or is the impulse positive 8?