# couple

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Related to coupledom: call on, undeterred, bumped up

## couple

1. Chiefly hunting or coursing
a. a pair of collars joined by a leash, used to attach hounds to one another
b. two hounds joined in this way
c. the unit of reckoning for hounds in a pack
2. Mechanics a pair of equal and opposite parallel forces that have a tendency to produce rotation with a torque or turning moment equal to the product of either force and the perpendicular distance between them
3. Physics
a. two dissimilar metals, alloys, or semiconductors in electrical contact, across which a voltage develops
b. two dissimilar metals or alloys in electrical contact that when immersed in an electrolyte act as the electrodes of an electrolytic cell

## Couple

A system of two parallel forces of equal magnitude and opposite sense. Under a couple's action a rigid body tends only to rotate about a line normal to the couple's plane. This tendency reflects the vector properties of a couple.

The total force of a couple is zero. The total moment C of a couple is identical about any point. Accordingly, C is the moment of either force about a point on the other and is perpendicular to the couple's plane. See Resultant of forces, Statics

The moment of a couple about a directed line is the component of its total moment in the line's direction. Couples are equivalent whose total moments are equal.

## Couple

a system of two forces P and P’ acting on a rigid body that are equal to each other in absolute value, are parallel, and are opposite in direction—that is, P’ = – P (see Figure 1). A couple has no resultant. In other words, its action on a body cannot be mechanically equivalent to the action of any single force; accordingly, a couple cannot be balanced by a single force.

The distance l between the lines of action of the two forces is called the arm of the couple. The effect of a couple’s action on a body is described by the couple’s moment, which is represented by a vector M equal in absolute value to the quantity Pl and perpendicular to the couple’s plane on the side where the rotation

Figure 1

caused by the couple appears to be counterclockwise in a right-handed coordinate system. A basic property of a couple is that the effect of its action on a given body is not changed if the couple is shifted anywhere in its plane or in a plane parallel to its plane. In addition, if the absolute value of the forces of the couple and the length of the arm are changed while the moment of the couple is kept fixed, the effect on the body is not changed. Thus the moment of a couple can be regarded as applied to any point of the body. If two couples have identical moments M and are applied to the same body, they are mechanically equivalent to each other. Any system of couples that are applied to a given body is mechanically equivalent to a single couple having a moment equal to the geometric sum of the moment vectors of the couples. If the geometric sum of the moment vectors of a system of couples is equal to zero, the system is balanced.

S. M. TARG [19–4–85–3]

## couple

[′kəp·əl]
(chemistry)
Joining of two molecules.
(electricity)
To connect two circuits so signals are transferred from one to the other.
(electronics)
Two metals placed in contact, as in a thermocouple.
(engineering)
To connect with a coupling, such as of two belts or two pipes.
(mechanics)
A system of two parallel forces of equal magnitude and opposite sense.

## couple

Two equal and opposite parallel forces, with different lines of action, tending to produce rotation of a body; their moment equals the product of the magnitude of one of the forces and the perpendicular distance between them.
References in periodicals archive ?
At the start of the episode showing his wedding to Greg, Rob makes a casual comment about kicking out men he and his partner have picked up for the night; this suggests a quite non-heteronormative (although fairly common) approach to non-monogamous coupledom.
Suddenly, marriage is granted a surprising--and questionable--degree of autonomy, as if the economic and political determinations on personal life had unaccountably withered away and coupledom now occupied its own separate sphere, operating by its own private rules, cordoned off in a protective bubble.
The average age of respondents was 36 years old and the average duration of the relationship was five years, although there was a wide range in the ways they lived their coupledom.
Now's the purr-feet time to cozy up to coupledom, so say yes when that cutie invites you to grab a PSL.
In it, the two called their coupledom a "normal relationship with a giant magnifying glass applied.
C, Jun 2 ( ANI ): There are going to be teardrops on Tayvin shippers' guitars as Taylor Swift and Calvin Harris have reportedly called it quits after 15 months of blissful coupledom filled with PDA moments on social media and television.
There's balloons and L plates and selfies and conspicuous bottles of cava and even though I try to feel happy about the impending rite of coupledom being celebrated and tell myself that people are always too ready to police the public joy of Northern men and women, I can't help wishing that they'd have their public joy somewhere else so I can get on with reading my Pat Barker.
Some of the sharpest scenes in the film concern the various ways in which even a fake couple are forced to contend with the problems of coupledom and child rearing, as the emotionally fragile Illayaal begins acting out at school, and craves an unconditional love that neither of her "parents" knows how to provide.
Our favourite stories still tend to privilege romantic love and coupledom, especially where female characters (straight or otherwise) are concerned; we have a long way to go before we travel past the archetypes of Woman in Love and Woman as Object of Love.
They've shown they can manage a coupledom - and the press attention - expertly, and now they can use that experience to steer all the kids in the right direction.
And at the age of 55 the former model was moving in with her toyboy lover and looking forward to a life of cosy coupledom.
But before we roll our eyes and think "how very 1950s", fear not, the PM is PC in his celebration of coupledom.

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