A force couple is defined as two equal and opposite forces which act in a different line and contributes to the rotation of the body in a certain direction. The turning effect, or moment, of a couple, is measured by the product of the magnitude of either force and the perpendicular distance between the action lines of the forces. A pure couple always consists of two forces equal in magnitude.
- The steering wheel of a vehicle when someone is driving
- The action of screwdriver