# Vectors

## Why Study Vectors?

You use vectors in almost every activity you do. A vector is a quantity that has** size** and **direction**. The fancy word for size is "magnitude".

Examples of everyday activities that involve vectors include:

- Breathing (your diaphragm muscles exert a
**force**that has a magnitude and direction) - Walking (you walk at a
**velocity**of around 6 km/h in the direction of the bathroom) - Going to school (the bus has a
**length**of about 20 m and is headed towards your school) - Lunch (the
**displacement**from your class room to the canteen is about 40 m in a northerly direction)

Each vector quantity has a **magnitude** and a **direction**.

## In this Chapter

We start slow and easy by talking about simple vectors:

Next, we move on to 2-dimensional vectors

Next up is the interesting 3-D stuff:

To round out this chapter, we talk about

### Examples of Vector Art

Source: Traditional Japan by j4p4n

Source: Tribal Kitten by GDJ

Source: JSON logo by 1001FreeDownloads

The above images are in **Scalar Vector Graphics (SVG)** format. Try zooming really close and you'll see there is no pixelation.

See more on Vector Art later in the chapter.

Let's start the chapter with Vector Concepts and Notation.

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