A couple moment is a _______ vector

a-couple-moment-is-a-vector-a-gradient-b-scalar-c

A couple moment is a _______ vector.
A. Gradient
B. Scalar
C. Del
D. Free
Right option is D. Free

A couple moment is a free vector. It can act anywhere between the forces. As the couple is formed by two forces acting in the opposite directions. These forces are separated by a distance r, say, then the moment caused by them can act anywhere in between these forces.