FORCE COUPLE

                                                             FORCE COUPLE

 

The force whose lines of action are parallel to each other are called parallel force.Parallel force are of two types they are parallel force and unlike forces.


Two forces are said to be like when they act in the same direction.Two parallel forces are said to  be unlike when they act in opposite directions.

Resultant of two unlike parallel forces of same magnitude is zero.It have same magnitude,opposite sense and parallel line of action are said to be couple.The plain in which the force act is called plane of the couple.The distance between the line of action of forces is called arm of couple.The moment of couple is always equal to the product of the magnitude of one of the force forces and the arm of couple.

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