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Homework Help: Freefall kinetic energy?

  1. Nov 8, 2012 #1
    1. The problem statement, all variables and given/known data
    You drop a ball from a high balcony and it falls freely. Does the ball's kinetic energy increase by equal amounts in equal time intervals, or by equal amounts in equal distances? Explain.

    2. Relevant equations
    KE = 1/2mv^2
    PE = mgy
    Conservation of energy: Emech = KE + PE; Esys = Emech + Eth

    3. The attempt at a solution
    I think that it increases by equal amounts in equal distances, seeing as potential energy has to do with height. I'm just not sure how to explain it?
    Thanks :)
  2. jcsd
  3. Nov 8, 2012 #2


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    Science Advisor
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    Gold Member

    You are correct. You should write out the conservation of mechanical energy equation which you haven't done yet, that relates the change in KE with the change in PE.
    Welcome to PF!
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