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 Homework Statement:
 The ramp ABCD is supported by cables at corners C and D. The tensile force in both cables is 420N. Determine the moment about point A produced by the force exerted at point C.
 Relevant Equations:

Moment at A (MA) = rGA x TCG.
Where rGA = GA/GA
TCG = 420N
Problem illustration:
The possible answers are:
I don't understand why it says Mc if it is asking for the moment at A, not C. But maybe I am getting something wrong.
So with the formulas I posted above, I have this:
The possible answers are:
I don't understand why it says Mc if it is asking for the moment at A, not C. But maybe I am getting something wrong.
So with the formulas I posted above, I have this:
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