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A revolutionary war cannon, with a mass of

2170 kg, fires a 18.1 kg ball horizontally. The
cannonball has a speed of 146 m/s after it has
left the barrel. The cannon carriage is on a
flat platform and is free to roll horizontally.
What is the speed of the cannon immedi-
ately after it was fired?
Answer in units of m/s.

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