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Playing bumgy jump

  1. Aug 16, 2004 #1
    Suppose a boy is playing bumgy jump. When he jumps out and reachs the lowest bottom (instanteous at rest), there is zero K.E.
    At that time, there is max. elelastic potential energy in the string. Which energy is changed to it(max. elelastic potential energy) :confused: ?
  2. jcsd
  3. Aug 16, 2004 #2

    Doc Al

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    Staff: Mentor

    don't forget gravity

    When the boy jumps he has zero KE but maximum gravitational PE (with respect to the ground). It's that gravitational PE which gets transformed into elastic PE.
  4. Aug 16, 2004 #3
    Of course, the gravitationnal PE first turns into KE, which then turns into the elastic PE.
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