Average speed
When an object moves in a straight line at a steady speed, you can calculate its average speed if you know how far it travels and how long it takes. The following equation shows the relationship between average speed, distance moved and time taken:
where:
average speed is measured in metres per second, m/s
distance moved is measured in metres, m
time taken is measured in seconds, s
For example, a car travels 300 m in 20 s. Its average speed is:
300 ÷ 20 = 15 m/s
(Notes are courtesy of BBC Bitesize)
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