RESOLUTION OF A FORCE INTO A FORCE AND A COUPLE
Fig. 3.14(a) A force F is acting at point A in the plane.
Fig. 3.14(b) à At point B, two forces F and- F are acting. (the net external effect on the body remains the same)
Fig. 3.14(c) à At point B, there is a force F and a clockwise moment M =- Fx, because- Fat Band F at A constitute a couple whose magnitude is Fx. The sense is clockwise.