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Physics

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A high diver of mass 70 kg jumps off a diving board and enters the water with the speed of 10 m/s the average upward resistance force of water exerts on the diver is 200 N. How far in the water will the diver travel before coming to rest?

  • Physics -

    assume hydrostatics is negligible

    F = m a
    a = 200/70 = 2.86

    v = Vi - a t
    0 = 10 - 2.86 t
    t = 3.5 seconds to stop

    d = Vi t - (1/2)(2.86) t^2

    d = 10 (3.5) - 1.43 (3.5)^2

    d = 35 - 17.5

    d = 17.5 meters

    well, that is what we get. It is ridiculously high but so be it. Let's hope it is a really, really, deep pool :)

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