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Homework Help: Impulse-momentum theorem

  1. Oct 20, 2011 #1
    (a)Use the impulse-momentum theorem to find how long a falling object takes to increase its speed from 4.5 m/s to 14.5 m/s

    (b) J=mΔv

    (c) I have 2 unknowns...J and m so how am I suppose to solve this?
     
  2. jcsd
  3. Oct 20, 2011 #2

    Doc Al

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    Staff: Mentor

    Hint: Write an expression for J. (What force acts?)
     
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