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. If one arrow is twice as long as another, it ...

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, ...