(A) couple is defined as the product of a force and the perpendicular distance between the two forces (arm length).Mathematically,$\text{Couple} = \te

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(A) couple is defined as the product of a force and the perpendicular distance between the two forces (arm length).Mathematically,$\text{Couple} = \text{Force} \times \text{Arm length}$.The dimensional formula of force is $[MLT^{-2}]$.The dimensional formula of length is $[L]$.Therefore,the dimensions of a couple are $[MLT^{-2}] \times [L] = [ML^2T^{-2}]$.