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A child and sled with a combined mass of 59.0 kg slide down a frictionless slope. If the sled starts from rest and has a speed of 3.40 m/s at the bottom, what is the height of the hill?

  • physics -

    mass not relevant

    (1/2) m v^2 = m g h
    mass cancels
    v^2 = 2 g h
    v = sqrt (2 g h)
    h = v^2/(2 g)

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