vector

vector, quantity having both magnitude and direction; it may be represented by a directed line segment. Many physical quantities are vectors, e.g., force, velocity, and momentum. Thus, in specifying a force, one must state not only how large it is but also in what direction it acts.

Sections in this article:

• Introduction
• Vector Analysis and Vector Space
• Addition and Multiplication of Vectors
• Representation and Reference Systems
• Bibliography

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