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Homework Help: Conservation of momentum

  1. Jul 25, 2008 #1
    1. The problem statement, all variables and given/known data

    A large fish travelling at 2m/s initially swallos at a smaller fish which is initially at rest. The large fish then, travels at a reduced speed. The large fish weighs 3 times heavier than the smaller fish. What is the velocity of the large fish and the small fish after the collision?

    I have no clue as to how to figure this out. Shouldn't both fish be traveling at the same speed after the collision?
     
    Last edited: Jul 25, 2008
  2. jcsd
  3. Jul 25, 2008 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Right. It's an example of a completely inelastic "collision". Set initial momentum equal to final momentum.
     
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