Unit vector is a vector which has unit or "1" magnitude and pointing at a certain direction. It is only used for defining directions then what is this 1or unit magnitude? I cannot understand?Please help

Question

Unit vector is a vector which has unit or "1" magnitude and pointing at a certain direction. It is only used for defining directions then what is this 1or unit magnitude?  I cannot understand?Please help

michele_laino · Answer

If I call v a unit vectr, the, by definition, we have:
$$v*v=1,$$
where * denote the scalar product

michele_laino · Answer

sorry...where * denotes the salar poduct...

shamim · Answer

The length of a unit vector is 1

anonymous · Answer

It is sometimes advantageous to separate the magnitude of a vector from its direction .  This is done be expressing the vector as the product of its scalar magnitude and the unit vector in  its direction.