...PROP. All statical couples are equivalent to -each other whose planes are parallel and moments equal. DEFINITION. The moment of a couple is the product of one of the forces into the arm, or P.AB in the foregoing propositions. Pl /I e the original couple, whose moment...

...PROP. All statical couples are equivalent to each other whose planes are parallel and moments equal. DEFINITION. The moment of a couple is the product of one of the forces into the arm, or P.AB in the foregoing propositions. .) be the original couple, whose moment...

...unlike. The arm of a couple is the perpendicular distance between the lines of action of its forces. The moment of a couple is the product of one of the equal forces into the arm; that is, the number which expresses the force must be multiplied by the number which expresses the...

...Def. — The arm of a couple is the perpendicular distance between the lines of action of its forces. The moment of a couple is the product of one of the equal forces and the arm. . . , The tendency of a couple acting on a rigid body is evidently to cause rotation,...

...the forces upon the line of action of the other. Thus the arm of the couple (P, P) is the length AB. The Moment of a couple is the product of one of the forces forming the couple and the arm of the couple. 69. Theorem. The algebraic sum of the momenta...

...application is at an infinite distance. Such a pair of forces may cause a body to revolve around an axis. The moment of a couple is the product of one of the forces and the perpendicular distance between their lines of action. One couple is in equilibrium with...

...(as long as its moment is kept the same) without affecting the equilibrium of the body. Moments. — The moment of a couple is the product of one of the forces and the length of the arm. It is usual to speak of the moment of a force about a given point...

...Adopting this method, we get : — Or, Ri = W, + W2 + W + W3 Ra = 5 + 10 + 20 + 15 - 22 (cwts.) E. = 28 cwts. Couples. — 'We shall now show that all...is the product of one of the equal forces into the V. ™, . v. j v. 1 Thus, if a body be acted on by two equal and opposite parallel forces, P, P, whose...

...But, f =OA+AB; J: hence, the preceding expression becomes P.OA+P.AB-P.OA; or, simply P.AB; that is, the moment of a couple is the product of one of the forces into the perpendicular distance between the lines cf action of the forces. This is independent...

...determined. A Couple consists of two equal, opposite, parallel forces not acting in the same straight line. Moment of a couple is the product of one of the equal forces by the perpendicular distance between them. Center of gravity of a body or a system of bodies is a...