How do two equal, parallel, non-collinear forces acting in opposing directions behave________________?
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Answer: C. constitute a couple
Explanation
Two equal forces acting parallel to each other in opposite directions create a pure rotational effect. Because their lines of action do not coincide, they generate a turning moment without any net translation. This specific mechanical arrangement is universally defined in physics and engineering as a couple. A force has both magnitude and direction, and parallel forces share identical or opposite line orientations. Non collinear means the forces are separated by a perpendicular distance known as the moment arm. Couples produce rotation around an axis perpendicular to the plane containing the two opposing forces.
Option A is incorrect because opposing forces do not balance out to zero motion when they are non collinear. Option B describes a general moment rather than the specific dual force system known as a couple. Option D and E use redundant terminology that obscures the standard definition of a couple.
- Subject
- Engineering
- Category
- Civil Engineering
- Topic
- —
- Difficulty
- medium
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