(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Calculate the moment of the 90N force about point O for the condition theta=15 degrees.

2. Relevant equations

Moment= Force* perpendicular distance

3. The attempt at a solution

I am doing the first step

Fx= 90sin theta

Fy= 90costheta

What i got was Moment= (Fx*0.8) + (Fy*0.6)= 72sintheta + 54costhetha

When I looked at the worked solution, they got a -Fx*0.8, i dont understand how the negative sign came about. Can you help out? Thanks

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# Homework Help: Calculate the moment mechanics problem

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