...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 another when the moment of the one equals the moment of the other,...

...the tendency which a couple has to turn a body round an axis, ie its torsional raliie, is measured by the product of one of the forces and the perpendicular distance between them ; eg PX BC (Fig. 353). Considering P alone, as to its torsional value (or tendency to turn a body...

...Since these two forces, T and C, are equal, their moment, which is the resisting moment of the beam, is equal to the product of one of the forces and the distance between them. Hence we may write for the resisting moment of the beam M = Td' = Afd' = pbdfd'...

...follows from the above that no single force can balance a couple. The moment of a couple is measured by the product of one of the forces and the perpendicular distance between them, called the arm of the couple. EXPT. — Using the suspended rod, Fig. 72, apply two equal horizontal...

...assigned axis is - F^AB) - F^BC} + F^BC} = - F^AB). Consequently, the moment of a force couple equals the product of one of the forces and the perpendicular distance between the lines of action of the two forces constituting the couple, and is independent of the position of...

...couple tending to turn the needle out of the magnetic meridian. The moment of this couple (p. 346) being the product of one of the forces and the perpendicular distance between them, is, therefore, But if / represents the length of the little needle, BC can be expressed in terms...

...of translation nor acceleration of the center of mass. A couple is simply a rotator, and its moment is equal to the product of one of the forces and the perpendicular distance between them, Fd. The perpendicular distance d is called the arm of the couple. The moment of the couple is...

...-fo^ - Q I• i, II J jf *<? 19. Moment of a Couple. — The moment of a couple about any point in its plane is equal to the product of one of the forces and the perpendicular distance between the lines of action of the two forces forming the couple ; for, Let the couple be as represented by...

...of action (F and F', upper sketch, Fig. 24) constitute a Couple. The torque developed by this couple is equal to the product of one of the forces, and the distance AC between them, and is entirely independent of the position (in the plane of the figure)...

...the moment of the couple about the assigned axis is Consequently, the moment of a force couple equals the product of one of the forces and the perpendicular distance between the lines of option of the two forces constituting the couple, and is independent of the position of...