...system of two parallel, contrary, and equal forces applied to a rigid body. The Arm of a couple is the perpendicular distance between the lines of action of the two forces. The Moment of a couple is the product of its force and arm. The forces of a couple are usually represented...

...sum of the moments of the forces of a couple about any point in the plane of the couple is constant. The perpendicular distance between the lines of action of the two forces of a couple is called the Arm of the couple. 38. In Arts. 36 and 37, if the point 0 be taken anywhere...

...body, and not to move it along any resultant path. Such a combination of forces is called a coupled The perpendicular distance between the lines of action of the two forces is called the arm of the couple; the perpendicular to the plane of the couple at the middle point of the arm, is called...

...equal 0, their effect will be to rotate the body about an axis. Such a combination of forces is called a couple. The perpendicular distance between the lines of action of the forces is called the arm of the couple, and the plane containing these lines of action ihQ plane of...

...upwards through B', these two forces forming a righting couple, the arm of which is GZ — that is, the perpendicular distance between the lines of action of the two forces. The moment of this couple — that is, the weight of the ship, or its displacement, multiplied by the...

...0. Indicating the senses, as in the figure, the couple is fully represented by the lines 04 and 4 0. The perpendicular distance between the lines of action of the two forces is termed the lever-arm of the couple. Components of a Force. (15.) The components of a force are the...

...and parallel forces acting in opposite directions. (See Art. 180.) )P DEF. — The Arm of a couple is the perpendicular distance between the lines of action of the two forces. DEF. — The Moment of a couple is the product of either force into the arm=Pa. It is evident that...

...CHAPTER VI. COUPLEs. 68. Def. Two equal unlike parallel forces form a couple. The Arm of a couple is the perpendicular distance between the lines of action of the two forces which form the couple, ie is the perpendicular drawn from any point ' lying on the line of action of...

...directions of the two forces is called the Arm of the couple. (iii) The product of either force into the perpendicular distance between the lines of action of the two forces — the arm of the couple — is called the Moment of the Couple. (iv) A line drawn at right angles...

...resultant force ; they cannot then be balanced by a single force. Such a system is called a couple, and the perpendicular distance between the lines of action of the two forces is called the arm of the couple. Thus, in Fig. 83, if two equal and opposite forces F Ibs. act at A and B perpen- FIG....