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Pendulum in water

  1. Jun 26, 2008 #1
    1. The problem statement, all variables and given/known data

    first question: If a simple pendulum with a period of 1 second is set in motion on the moon,determine the new period of this pendulum.

    second question: If a pendulum is made to swing in water,compare the time taken for this pendulum to come to a complete stop with the time taken by a pendulum swinging in air. Explain the difference.

    2. Relevant equations

    T=2(3.142)x(1/g)^1/2

    3. The attempt at a solution

    first question: the pendulum will swing forever on the moon because it is in a vacuum rite? but what does it mean by determine the new period?
    the graph of period Ts against length for this question will be a straight line parallel to the x axis..?

    second question: if a pendulum is made to swing in water, the resistance is higher compare to air rite? so the time taken for a pendulum to come to a complete stop is shorter compare to a pendulum swinging in the air...so the answer should be resistance?
    but what is the graph of pendulum in water (period against length) would be like? is it a curve? have a lower gradient compare to the graph of pendulum in air?

    i just want to make sure i did right for my coursework. thx for your help.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Jun 26, 2008 #2

    nicksauce

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    Science Advisor
    Homework Helper

    The period depends on g. g is different on the moon. Hence the period will be different.
     
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