Problem: What is the average speed of an object that moves 28 meters in 7 seconds?
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Solution: Average speed is average number of meters in a second. 28 meters in 7 seconds is 4 meters in 1 second. So the result is 4 meters per second.
Generalized Response: Average speed is average distance per unit of time. If distance is `dist and the time interval is `dt, then `dist / `dt is the average distance per time unit.
Thus vAve = `dist / `dt.
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Figure description:
We can again use the triangular diagram to depict the relationship among `ds, `dt and vAve. In this case we can use vAve = `ds / `dt. To be more precise we should say
vAve = `ds / `dt.
This in fact is usually taken as the definition of average velocity.
