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A 27-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, her kinetic energy decreases to 200 J from 480 J. How high does she rise during this interval? Neglect air resistance.

  • physics -

    ΔKE= ΔPE
    h=(480-200)/27•9.8 = 1.06 m

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