speed

Speed is a measure of how fast an object is travelling over a specific time.

The formula for speed is:

    \text {Speed}= \dfrac{\text {distance}}{\text{time}}

The unit of speed will depend on the unit of distance and unit of time used in the calculation.

For example, if distance is measured in miles and time is measured in hours, the unit of speed would be miles per hour (m.p.h.).