He forgot to set the brakes on the machine if friction


A tennis ball machine holds 200 balls and has a mass of 36.0 kg when empty. Each tennis ball has a mass of 57.0 g. A coach has set the machine to launch balls horizontally with a speed of 53.0 m/s. He forgot to set the brakes on the machine. If friction between the machine and the court is negligible and all 200 balls are launched, what is the final speed of the machine?

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Physics: He forgot to set the brakes on the machine if friction
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