alleryThe moment of a force vanishes if the force is zero or its line of action passes through the:
AOutline
BOpening
COverlap
DOrigin
Answer & Solution
Correct answer: D. Origin
1. Moment depends on where the force acts, not only how big it is.
2. A force aimed straight at the reference point turns nothing.
3. The moment of a force vanishes if the force is zero or its line of action passes through the origin.
4. So the answer is the origin.
_Source: syllabus Physics Part I, Ch 6 'Systems of Particles and Rotational Motion'_
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