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Physics. PLEASE HELP!!

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A ball bounces to 45 percent of its original height.
What fraction of its mechanical energy is lost each time it bounces?
What is the coefficient of restitution of the ball-floor system?

  • Physics. PLEASE HELP!! -

    (a) 55% is lost and 45% is kept after each bounce.
    (b) 0.45

  • Physics. PLEASE HELP!! -

    Your answers are incorrect. But thank you for your help. :)

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