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Homework Help: Where is the center of mass?

  1. Oct 7, 2007 #1
    3 equal masses lie at the corners of an equilateral triangle of side L. Where is the center of mass?

    i know center of mass in the x axis is just 0 which is apparent from symmetry, but how would you figure out center of mass in the y axis? i keep getting 0.577 L . someone please make this clear to me??
  2. jcsd
  3. Oct 7, 2007 #2
    i'm picturing one of the vertices on the origin and the rest of the two vertices below the x axis .. is this more clear?
  4. Oct 8, 2007 #3


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    looks right to me... x = 0. y = -0.577L. why do you think this is wrong?
  5. Oct 8, 2007 #4
    hi again! well because the ans key says L/2(sqrt 3) .. but i feel much better that you came up with the same answer!
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