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Replace with equivalent force-couple system?

by SUCRALOSE
Tags: equivalent, forcecouple, replace
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SUCRALOSE
#1
Feb6-12, 05:57 PM
P: 12
My book has one page on this and I do not understand what they want...

Please see attached picture for problems..

First one, left side, says replace the 5KN force with an equivalent force-couple system at O.

and

The second one says to replace the 500N force with a equivalent force-couple system at B.

Thanks a lot
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Spinnor
#2
Feb6-12, 08:53 PM
P: 1,375
I think what you want is C = rXF where r is the vector from the point in interest to the point where the force acts and F is the applied force vector.

C = r_x*F_y - r_y*F_x

See, "What is a couple?"

In

http://plus.maths.org/content/unspinning-boomerang


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