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 ...