- #1
sara.
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Homework Statement
I'm having problems with understanding how to use the right hand rule as it applies to forces and determining moments. If I understand correctly, The fingers point in the direction of the force, then curl in the direction of r, but I'm not sure what r would be in this case.
http://imgur.com/1axaTme
Homework Equations
M=r X F
The Attempt at a Solution
My main struggle is with the force in the upper right corner. If I'm trying to find the moment about point A from this force, I point my fingers in the direction of F, then curl them in the direction of r which I'm considering to be from A to F, and I wind up with my thumb pointing into my computer screen. I'm not sure if this is correct.