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Center of Mass Figures

  1. Jul 21, 2012 #1
    1. FIgures in this link:
    ( a donut, and a Box with and empty box inside)
    http://postimage.org/image/smdut3cxb/ [Broken]


    2.Find the CoM of the two figures



    3. as i attempted for the circle:




    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
    Last edited by a moderator: May 6, 2017
  2. jcsd
  3. Jul 21, 2012 #2

    Simon Bridge

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    Welcome to PF;
    How have you attempted these problems?

    Do you understand where the com would be if the hole weren't there?
    Are these images 3D? i.e. is the circular one literally a torus (a donut shape)?
     
  4. Jul 21, 2012 #3

    CWatters

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    One word hint....Symmetry
     
  5. Jul 21, 2012 #4

    tiny-tim

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    erm :redface:guys

    haven't you notived the edit about two hours ago? :wink:
     
  6. Jul 21, 2012 #5

    CWatters

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    Anyone know how to solve problems involving glases/lenses :-)
     
  7. Jul 21, 2012 #6

    Simon Bridge

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    Nah - nobody reads those messages :)
     
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