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Calculate elasticity of collision from kinetic energy loss?

  1. Nov 30, 2014 #1
    1. The problem statement, all variables and given/known data
    After a lot of searching I can't seem to find a way to solve this. Basically, for a bouncing ball, if I know the dropped height and rebound height in a vacuum. How do I calculate the elasticity between the ball and the floor?

    2. Relevant equations
    K = 1/2 mv2

    3. The attempt at a solution
    I did a lot of searching online...but I still have no idea. I tried to calculate kinetic energy loss, but what's after that?
     
  2. jcsd
  3. Nov 30, 2014 #2
    Any help is appreciated, thank you!
     
  4. Nov 30, 2014 #3

    haruspex

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    What definition do you have for elasticity?
     
  5. Nov 30, 2014 #4
  6. Nov 30, 2014 #5

    haruspex

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    That doesn't define elasticity. You need a definition to have any hope of answering the question.
    The concept of a coefficient of elasticity arises in many diverse subjects. In collisions, the more usual term is the coefficient of restitution: http://en.wikipedia.org/wiki/Coefficient_of_restitution. See if that helps.
     
  7. Nov 30, 2014 #6
    Ah, this is exactly what I m looking for, thank you so much!
     
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