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Unit vector Facts for Kids. *Kiddle Encyclopedia.*

A **unit vector** is any vector that is one unit in length.

Unit vectors are often notated the same way as normal vectors, but with a mark over the letter (e.g. is the unit vector of **a**.)

To make a vector into a unit vector, divide it by its length:

Three common unit vectors used in component form are , and , referring to the unit vectors for the x-, y- and z-axes respectively. They are commonly just notated as **i**, **j** and **k**.

They can be written as the following:

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Unit vector Facts for Kids. - This page was last modified on 1 July 2019, at 18:31.