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Homework Help: How do you calculate Center of mass

  1. Mar 23, 2010 #1
    1. The problem statement, all variables and given/known data

    I'm confused about how to find the center of mass



    2. Relevant equations
    So the equation my professor gives Cm=sum of MR/sum of masses

    3. The attempt at a solution
    Where exactly is this R reference point?
  2. jcsd
  3. Mar 23, 2010 #2


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    You just pick a point, for example if you pick your reference as the 2kg mass, then your COM will be measured from there.
  4. Mar 23, 2010 #3
  5. Mar 23, 2010 #4


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    the 'x's are measured relative to wherever you take your reference point as.
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