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# Rebounding Pool Ball

APPH12-PLWCY@

A pool ball with a mass of $0.2\ \text{kg}$ is approaching the wall of a pool table at $5\ \text{m/s}$ and rebounds in the opposite direction at the same speed.

If this collision takes $0.5\ \text{s}$, what is the average magnitude of force exerted by the wall on the pool ball?

A

$0\ \text{N}$

B

$1\ \text{N}$

C

$2\ \text{N}$

D

$4\ \text{N}$