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Express the moment of the couple acting on the rod in cartesian vector form. What is the magnitude of the couple moment?

Express the moment of the couple acting on the rod in cartesian vector form What is the magnitude of the couple moment class=

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MissPhiladelphia
We are given with the vectors
-F = 4i - 3j + 4k
and
F = -4i + 3j - 4k
To get the moment, we determine the cross product between the two vectors
-F x F = 0i + 0j + 0k
The magnitude is 0 but this is if the pivot is the origin. In the couple, the magnitude is 4.

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