Physics

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?

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  1. looks good

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

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