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Homework Help: Conservation of momentum (extremely easy but confusing)

  1. Oct 29, 2008 #1
    1. The problem statement, all variables and given/known data
    If the mass of an object increases, its momentum
    A. always increases
    B. always decreases
    C. sometimes increases, sometimes decreases
    D. sometimes decreases, never increases
    E. sometimes increases, never decreases

    2. Relevant equations

    3. The attempt at a solution
    I figured if one of the variables increased the whole would increases but it turned out to be wrong.
    Then if the velocity changed with the mass momentum would remain the same. but that choice is nowhere to be found.

    Thank you
  2. jcsd
  3. Oct 29, 2008 #2


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    In my opinion, the question in itself is poorly worded as we have no information regarding the velocity. However, since we have no information on the velocity, we have no way of knowing if the momentum will increase or decrease so I would have to say C.
  4. Oct 29, 2008 #3
    Turned out to be wrong... :( that was my last shot.
    Thats such a bad question... is any other answer possible?
  5. Oct 29, 2008 #4
    The question clearly has been phrased in a horrible way, I agree with Hoot. A smart student should answer c), a not so smart student will probably answer a) and might even get it "correct." Where did you get this question?
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