# Unit Vectors

## Key Questions

• The direction of a vector is the direction along which it acts.
It has a certain magnitude.

For example, we say 10 N force in the east.
Here, 10 N is the magnitude and towards the east is the direction.

The direction is specified using a unit vector.
Let n be a unit vector along a certain direction and $A$ be some scalar, then a vector with magnitude that of $A$ and direction that of n is defined as,

A = $A$ n

• A unit vector is a vector that has a magnitude(length) of just 1 unit.

Please see the video example below ...