A girl of mass 50kg jumps out of a rowing boat of mass 300kg on the bank, with a horizontal velocity of 3m/s. With what velocity does the boat begin to move backwards?
This question is about the momentum
by 
Dr.Tso
ANSWERS: 1
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For every force acting on one object there is an equal and opposite force action on another. F = Ma. So, as the girl jumps from the boat, equal but opposite forces act on both her and the boat. She is 1/6 the mass of the boat. So, the acceleration on the boat would have to be 1/6 that experienced by the girl causing it to accelerate to 1/6 the speed. 3 m/s ÷ 6 = 0.5 m/s. (This, of course does not take into account the drag that the water would have on the boat.)
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