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Coefficient of Restitution

  1. Sep 26, 2012 #1
    Hi all, I know this may see basic but how would I go about calcualting Impact velovity?

    The only information I have is:
    Height dropped, height bounced and from here I can calculate the CofR...

    But how would I go about finding impact velocity
     
  2. jcsd
  3. Sep 26, 2012 #2

    CWatters

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    Conservation of energy.
     
  4. Sep 26, 2012 #3
    YEs, I thought of that... but dont know the mass of the ball?
     
  5. Sep 26, 2012 #4

    SammyS

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    Use m for the mass of the ball.


    Both KE & PE are proportional to the mass, m.
     
    Last edited: Sep 26, 2012
  6. Sep 27, 2012 #5
    I don't get the question, i think it is wrong just because there is no need for the Coefficient of Restitution to find the impact (final ) velocity .

    The Equations for constant acceleration , once applied would be used to find the Impact velocity AND the rebound velocity
     
  7. Sep 28, 2012 #6

    SammyS

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    Some mechanical energy is lost in the bounce. Thus there is a coefficient of restitution.
     
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