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(n.) 1.An amount equalling four . 2.Two couples .
I have a double couple of words for that guy. Stop. The. Friggin' . Noise.
Two couples having sex at the same time in the same room.
Bruh let's have a double couple fuck!
What's that ?
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From Wikipedia, the free encyclopedia
Pair of equal and opposite forces acting along different lines of action of force on a rigid body

τ
=
F
d

{\displaystyle \tau =Fd}

τ

=

|

d

×

F

|

.

{\displaystyle \mathbf {\tau } =|\mathbf {d} \times \mathbf {F} |.}

^ Jump up to: a b c Dynamics, Theory and Applications by T.R. Kane and D.A. Levinson, 1985, pp. 90-99: Free download

^ Physics for Engineering by Hendricks, Subramony, and Van Blerk, page 148, Web link

^ Engineering Mechanics: Equilibrium , by C. Hartsuijker, J. W. Welleman, page 64 Web link

^ Jump up to: a b c Augustus Jay Du Bois (1902). The mechanics of engineering, Volume 1 . Wiley. p. 186 .

^ J.L. Ericksen (1979) Timoshenko Acceptance Speech at iMechanica.org site for mechanicians

In mechanics , a couple is a system of forces with a resultant (a.k.a. net or sum) moment but no resultant force. [1]

A better term is force couple or pure moment . Its effect is to create rotation without translation . In rigid body mechanics , force couples are free vectors , meaning their effects on a body are independent of the point of application.

The resultant moment of a couple is called a torque . This is not to be confused with the term torque as it is used in physics, where it is merely a synonym of moment. [2] Instead, torque is a special case of moment. Torque has special properties that moment does not have, in particular the property of being independent of reference point, as described below.

A couple is a pair of forces, equal in magnitude, oppositely directed, and displaced by perpendicular distance or moment.

The simplest kind of couple consists of two equal and opposite forces whose lines of action do not coincide. This is called a "simple couple". [1] The forces have a turning effect or moment called a torque about an axis which is normal (perpendicular) to the plane of the forces. The SI unit for the torque of the couple is newton metre .

If the two forces are F and − F , then the magnitude of the torque is given by the following formula:

The magnitude of the torque is equal to F • d , with the direction of the torque given by the unit vector

e
^

{\displaystyle {\hat {e}}}

, which is perpendicular to the plane containing the two forces and positive being a counter-clockwise couple. When d is taken as a vector between the points of action of the forces, then the torque is the cross product of d and F , i.e.

The moment of a force is only defined with respect to a certain point P (it is said to be the "moment about P ") and, in general, when P is changed, the moment changes. However, the moment (torque) of a couple is independent of the reference point P : Any point will give the same moment. [1] In other words, a torque vector, unlike any other moment vector, is a "free vector". (This fact is called Varignon 's Second Moment Theorem .) [3]

The proof of this claim is as follows: Suppose there are a set of force vectors F 1 , F 2 , etc. that form a couple, with position vectors (about some origin P ), r 1 , r 2 , etc., respectively. The moment about P is

Now we pick a new reference point P' that differs from P by the vector r . The new moment is

However, the definition of a force couple means that

This proves that the moment is independent of reference point, which is proof that a couple is a free vector.

A force F applied to a rigid body at a distance d from the center of mass has the same effect as the same force applied directly to the center of mass and a couple Cℓ = Fd . The couple produces an angular acceleration of the rigid body at right angles to the plane of the couple. [4] The force at the center of mass accelerates the body in the direction of the force without change in orientation. The general theorems are: [4]

Couples are very important in mechanical engineering and the physical sciences. A few examples are:

In a liquid crystal it is the rotation of an optic axis called the director that produces the functionality of these compounds. As Jerald Ericksen explained:

At first glance, it may seem that it is optics or electronics which is involved, rather than mechanics. Actually, the changes in optical behavior, etc. are associated with changes in orientation. In turn, these are produced by couples. Very roughly, it is similar to bending a wire, by applying couples. [5]

Published August 21, 2022 8:39am EDT
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A Washington man suspected in the brutal murders of a couple inside their home on Thursday is on the loose and should be considered armed and dangerous, authorities said.
Shaun D. Rose, 40, is believed to be hiding in the Pierce County and Tacoma area following the murders of Steven and Mina Schulz, both 51, at their home in the 12900 block of Shady Glen Avenue Southeast in Olalla, the Kitsap County Sheriff’s Office said Saturday.
The bodies of the Schulzes were discovered around 5:15 p.m. Thursday evening after the couple’s daughter went to check on them, the sheriff’s office said.
The daughter discovered someone had forced their way into the home and saw blood inside. Unable to locate either of her parents, deputies said she backed away from the home and called 911.

Investigators named Rose as a suspect in what they described as a "gruesome" and "brutal" double homicide.
(Kitsap County Sheriff’s Office )
Responding deputies checked the area, making the "gruesome" discovery of two adult bodies on the property, the sheriff’s office said. The bodies were later identified as Steven and Mina Schulz.
The Kitsap County Coroner’s Office is working to determine the Schulzes' cause and manner of death. No further details about the alleged murders were immediately provided.

Investigators said the bodies of Steven and Mina Schulz, both 51, were discovered at their home in the 12900 block of Shady Glen Avenue Southeast in Olalla, Washington, on Thursday evening.
(Kitsap County Sheriff’s Office )
Two days after finding the bodies, investigators named Rose as a suspect and said they obtained a felony warrant for his arrest in what they described as a "brutal" double homicide.

Rose is believed to be hiding in the Pierce County and Tacoma area, according to investigators. He should be considered armed and da
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