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Math Help - Centre Of Mass: Frame

  1. #1
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    Centre Of Mass: Frame

    I don't understand how you would find the centre of mass of CD from AB? Thanks in advance.
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  2. #2
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    Did you set it up on coordinate axes? I put the Origin in the lower left-hand corner.

    Can you find the Center of Mass? (a,b) The x-coordinate would answer the question in the problem.

    For the distance from CD, you need only the equation of CD which is simple enough (y-0) = (4/3)(x-4) or 4x - 3y - 16 = 0. This leads directly to the solution \frac{|4(a)-3(b)-16|}{5}.
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