For other meanings, see Couple Couple, as a noun, is close in meaning to pair, can refer to: two of any similar items; the publicly social bond between two people (most often heterosexual, but common use has also increasingly included homosexuals) in a sexual relationship: husband and wife; girlfriend and boyfriend; two girlfriends (ed. ...
A Couple is or are two equal and opposite forces whose lines of action do not coincide. The forces have a turning effect or moment called a torque about an axis which is normal to the plane of the forces. The SI unit for the torque of the couple is Newton metre. In physics, force is an influence that may cause a body to accelerate. ... Torque applied via a crescent wrench Relationship between force, torque, and momentum vectors in a rotating system In physics, Torque can informally be thought of as rotational force or angular force which causes a change in rotational motion. ... The International System of Units (symbol: SI) (for the French phrase Système International dUnités) is the most widely used system of units. ... Newton metre is the unit of moment in the SI system. ...
If the two forces are F and -F, then the magnitude of the torque is calculated by:
where
τ is the torque
F is the magnitude of one of the forces
d is the perpendicular distance between the forces
The magnitude of this torque is not dependent on the distance of the axis from either of the lines of action.
Suppose that the two forces are distance, d, apart and that the axis is distant, x, from one of the lines of action, then the torque τ is given by:
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