# What is meant by a component of a vector?

##### 1 Answer

Consider a vector

If you want to describe it to, say, a friend you can say that has a "modulus" (=length) and direction (you may use, for example, North, South, East, west...etc.).

There is also another way to describe this vector.

You must take your vector into a reference frame to have some numbers related to it and then you take the coordinates of the tip of the arrow...your **COMPONENTS** !

You can now write your vector as:

For Example:

In 3 dimensions you simply add a third component on the

For example: