physics

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a ball dropped on to a floor .if the coefficient of restitution is 0.5.the percentage loss of energy of the ball on rebounding from the floor is?

  • physics -

    Before: m(v1)^2/2
    After:
    since v2= v1/2,
    m(v2)^2/2 = m(v1)^2/2•4
    ΔE = E1- E2 = m(v1)^2/2 - m(v1)^/2•4 =
    = (3/4) •m(v1)^2/2

  • physics -

    75%

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