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A water-balloon launcher with mass 5 kg fires a 1 kg balloon with a velocity of 8 m/s to the east. What is the recoil velocity of the launcher?

2 answers

East velocities +
momentum before = 0
so momentum after = 0
1 * 8 + 5 * v = 0

v = 8/5 west

1.6 west

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