Speed is probably the easiest of the 3 compound measures to understand (the other 2 compound measures are Density and Force). We all know about the speed of cars for example, such as I was traveling in a car moving at a speed of 70 miles/hour.

In terms of formula for speed, we use the following:

A few examples …

Stem & Leaf Diagrams
Compound Measures - Density (Mass/Volume)