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# Fire at Will!

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A large cannon sits on a railcar with a total mass of $4.37 \times 10^3 kg$. The cannon shoots a $21.8 kg$ ball to the left at $208 m/s$. What is the recoil speed of the railcar?

A

$0.47 m/s$

B

$1.04 m/s$

C

$208 m/s$

D

$4530 m/s$