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Vector quantities have both magnitude and an associated direction. This makes them different from scalar quantities, which just have magnitude.

Examples of vector quantities

Some examples of vector quantities include:

• force, eg 20 newtons (N) to the left
• displacement, eg 50 kilometres (km) east
• velocity, eg 11 metres per second (m/s) upwards
• acceleration, eg 9.8 metres per second squared (m/s²) downwards
• momentum, eg 250 kilogram metres per second (kg m/s) south west

The direction of a vector can be given in a written description, or drawn as an arrow. The length of an arrow represents the magnitude of the quantity. The diagrams show three examples of vectors, drawn to different scales.