In this question, I'm asked to find P and alpha so that the
forces are a couple. I have found P and alpha, so my question is
related to finding the moment of the couple. In the solution, the
forces are broken down into x and y components, and the components
are multiplied by their respective perpendicular distances. Using
this method, the moment was found to be 272 Ncm. I was wondering
why it isn't possible to instead find the perpendicular distance
between the forces as they are written. Specifically, I tried
finding the perpendicular distance using d = √(8^2 + 12^2) = 14.42,
and then multiplying by 20 N to get 288.4 Ncm. Could someone please
explain why this wouldn't be possible?
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