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Finding the moment of intertia

  1. Feb 16, 2010 #1
    1. The problem statement, all variables and given/known data
    A solid sphere of mass 2 kg and 5 m radius is in space. Find its moment of inertia.

    2. Relevant equations2
    moment of inertia of a solid sphere about its diameter: [tex]\frac{2}{5}[/tex]MR2, where M is the mass of the sphere and R is its radius.

    3. The attempt at a solution
    I = mr^2 = (2 kg)(25 m^2) = 50 kgm^2

    Is that right, or am I totally out to lunch? Seems too easy.
    Last edited: Feb 17, 2010
  2. jcsd
  3. Feb 16, 2010 #2


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    Yes that looks correct to me.
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