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A child of mass 40.0 kg is swinging on a swing with ropes of length 4.0 m. How long does it take the child to swing from the maximum height on one side to the other?

  • Physics -

    Half of the period of the swing (which is essentially a pendulum).
    It will be independent of the mass.

    The period of a pendulum is
    2 pi sqrt(L/g)
    Half of that will be your answer.
    Having two ropes instead of one does not change the formula from that of a simple pendulum.

  • Physics -

    Thanks. I was confused by the way the question was worded and my answer was 2 times bigger than what the answer is supposed to be.

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