Moment
of a force: Part 1
The magnitude
of the moment of a force:
MO: Magnitude of the moment of
F around point O
d: Perpendicular distance
from O to the line of action of F
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Note: moving a force along
its line of action does not change its moment
Note: 
Direction of
the moment in 2-D: The direction of the moment
is given by the right hand rule: Counter Clockwise (CCW)
is out of the page, Clockwise (CW) is into the
page.
Calculating
the moment in 2-D using components: Moments add together as vectors. Select a positive
direction (CCW or CW), then calculate each moment and add them using the proper
sign for each term. For example:
ã Mehrdad Negahban and the University of Nebraska, 1996-2006.
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Copy and distribute freely for personal use only
Department of Engineering Mechanics,