# Physics - Momentum

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A child in a boat throws a 5.60 kg package out horizontally with a speed of 10.0 m/s. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 22.0 kg and that of the boat is 55.0 kg.

• Physics - Momentum -

5.6*10-(22+55)V =0

• Physics - Momentum -

M1V1 = M2V2 so
5.6*10 = (22+55)V2
56/77 = V2
0.727

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