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When several forces act on a rigid body, their turning effects combine. The resultant moment about a point is found by adding anticlockwise moments and subtracting clockwise ones.
What you'll be able to do
Choose a positive sense (usually anticlockwise). The resultant moment is the sum of the anticlockwise moments minus the sum of the clockwise moments.
Tip — Pick one positive direction and stick with it throughout the problem.
Formula recap
Common mistakes to avoid
Key takeaways
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