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The Principle of Conservation of Linear Momentum help2?
A 55 kg swimmer is standing on a stationary 230 kg floating raft. The swimmer then runs off the raft horizontally with a velocity of +4.9 m/s relative to the shore. Find the recoil velocity that the raft would have if there were no friction and resistance due to the water.
2 Answers
- 1 decade agoFavorite Answer
One goes one way, the other goes the other way.
(55)(4.9) + (230)(v) = 0
v = -1.17 m/s
- 1 decade ago
momentum before = 0
so momentum after must also = 0
the swimmers momentum is 55*4.9=269.5
the raft must have - this momentum so
230*velocity=-269.5
velocity=-269.5/230=-1.17m/s
