Answer:
Time
Explanation:
The average speed of an object that is moving is defined as the distance traveled divided by the time of travel. You can measure the distance with a ruler and the time with a stopwatch. This can be expressed as the following formula:
[tex]v=\frac{\Delta x}{\Delta t}[/tex]
For instance, if an object travels a distance [tex]\Delta x=100m[/tex] in 4 seconds, the the average speed is:
[tex]v=\frac{100m}{4s} \\ \\ \therefore \boxed{v=25m/s}[/tex]
