Chapter 7

Speed

What speed means and how to work it out from distance and time — with an interactive exercise.

Speed tells us how fast something moves. A faster object covers more distance in the same time.

Formula

$\text{Speed} = \frac{\text{Distance}}{\text{Time}}$

For example, a car that travels 100 m in 10 s has a speed of 100 ÷ 10 = 10 m/s. Speed is measured in units like metres per second (m/s) or kilometres per hour (km/h).

Remember

  • Speed = distance ÷ time.
  • More distance in the same time means a higher speed.

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