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Homework Help: I have question with answer ,,

  1. Jun 12, 2012 #1
    Hi all

    A golf ball is dropped from a height of 10 m on a fixed steel plate. The coefficient of restitution is 0.894 . Find the height to which the ball rebounds on the fist ,second and third bounces ?

    this solving for teacher I don't understand clearly can please explain step by step

    u1 =root(2gh)
    velocity of plate before and after impact
    u2= v2 = 0
    e(u1 - u2 ) =V2-V1
    e(root(2gh) - 0 ) = ( 0 - V1)
    V1 = -e X root(2gh)
    V^2 - u^2 = 2gh now u = zero
    V1 = 2gh1
    h1 = vb^2/2g
    h1 = e^22gh/2g
    h = e^2 X H (from this can find each height )

    Now I want from you explain the solving In fact I don't understand the solving of my teacher
  2. jcsd
  3. Jun 13, 2012 #2
    Which part that you do not understand?
  4. Jun 14, 2012 #3
    acuuly all parts I don't understand

    why u = =root(2gh) why not zero

    from where this equation V^2 - u^2 = 2gh

    please can explain to me step by step
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