Forces and Moments - continued- (Vectors)
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Example: Calculate the moment, M, of force, F, about point P. The line of action of the force, F, is from O to Q. The perpendicular distance from point P to the line of action of the force is PQ. So the moment of the force about point P is PQ x | F |.
M = ( r sin θ) F = | r x F | Note r sin θ is perpendicular distance from point P to the line of action of the force F M = r x F English units are lb ft and Metric units are Nm. Click here to continue with discussion about a moment of a force about a line. |
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