IEVref: | 102-03-21 | ID: | |

Language: | en | Status: backup | |

Term: | vector quantity | ||

Synonym1: | vector (2) [Preferred] | ||

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Definition: | quantity which can be represented by a vector (1) multiplied by a scalar quantity NOTE 1 The concept of "quantity" is defined in IEC 60050-111 and in the International Vocabulary of Basic and General Terms in Metrology (VIM). NOTE 2 The vector defining a vector quantity is generally a unit vector in the usual two- or three-dimensional geometrical space. A vector quantity can then be represented as an oriented line segment characterized by its point of acting, its direction and its magnitude, where the magnitude is a non-negative number multiplied by a unit of measurement. The components are also the product of a numerical value and the unit. Examples of vector quantities are: velocity, force, electric field strength. NOTE 3 A vector quantity may be considered either as attached to a point of acting (localized or bound vector), or as having any point of acting on a straight line parallel to it (sliding vector), or as having any point of acting in the space (free vector). NOTE 4 Operations defined for vectors apply to vector quantities. For example, the product of a scalar quantity | ||

Publication date: | 2007-08 | ||

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NOTE 1 The concept of "quantity" is defined in IEC 60050-111 and in the International Vocabulary of Basic and General Terms in Metrology (VIM).

NOTE 2 The vector defining a vector quantity is generally a unit vector in the usual two- or three-dimensional geometrical space. A vector quantity can then be represented as an oriented line segment characterized by its point of acting, its direction and its magnitude, where the magnitude is a non-negative number multiplied by a unit of measurement. The components are also the product of a numerical value and the unit. Examples of vector quantities are: velocity, force, electric field strength.

NOTE 3 A vector quantity may be considered either as attached to a point of acting (localized or bound vector), or as having any point of acting on a straight line parallel to it (sliding vector), or as having any point of acting in the space (free vector).

NOTE 4 Operations defined for vectors apply to vector quantities. For example, the product of a scalar quantity *p* and the vector quantity $Q=qe$ is the vector quantity $pQ=pqe$, where ** e** is a unit vector.

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