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Homework Help: Period of the Leg

  1. Aug 15, 2008 #1
    The period of the leg can be approximated by treating the leg as a physical pendulum, with a period of , where I is the moment of inertia, m is the mass, and h is the distance from the pivot point to the center of mass. The leg can be considered to be a right cylinder of constant density. For a man, the leg constitutes 16 \% of his total mass and 48 \% of his total height.
    Find the period of the leg of a man who is 1.75 m in height with a mass of 68 kg. The moment of inertia of a cylinder rotating about a perpendicular axis at one end is ml^2/3


    Leg=10.88kg AND 0.84m

    For the moment of inertia, what is the value for m and l?? is that the mass and length of the entire body?
  2. jcsd
  3. Aug 15, 2008 #2


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    Homework Helper

    The values of m and l that you need are for the leg only, which you are asked to treat as a cylinder swinging about one end; the numbers are the ones you've already calculated.
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