The speed of an object tells you how fast or slow it is moving. You can find the average speed of an object if you know:
- The distance travelled
- The time taken to travel that distance
This equation shows the relationship between average speed, distance and time:
Average speed = distance ÷ time
For example, what is the average speed of a runner who covers 100 m in 10 s?
Average speed = 100 ÷ 10 = 10 m/s
In science, average speed is usually given in metres per second, m/s. If you are given the distance in km, multiply it by 1000 to get the distance in m.