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Math Help - structural mehanics help needed!! - centre of gravity

  1. #1
    Newbie bandy1989's Avatar
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    structural mehanics help needed!! - centre of gravity

    please could i have help with the question attatched
    it is about centre of gravity.
    thanks
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  2. #2
    Senior Member vincisonfire's Avatar
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    Cut your figure into two pieces. (a square and a triangle)
    You can easily find the coordinates of the center of mass of the square using symmetry arguments.
    You can find the coordinates of the center of mass of the triangle using the definition of the mean
     c_x=\frac{\int x f(x) dx}{\int f(x) dx}
     c_y=\frac{\int y f(y) dy}{\int f(y) dy}
    Then you can find the center of mass of the whole thing with
    *MR = m_1r_1+m_2r_2 *r being the vectors of position.
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  3. #3
    Newbie bandy1989's Avatar
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    thanks

    thanks alot thats a big help.
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