physics

A child and sled with a combined mass of 50.0 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?

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  1. m g h = (1/2) m v^2
    as you can see the mass has no effect

    h = v^2/(2g)

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