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Relating Speed to Time and Distance
Average speed - the total distance divided by the total
time - this would include changes of speed and stops.
The defining formula for average speed is :
vav = ∆ d
∆ t
The change in a measurement is signified by using
the Greek letter ‘delta’ ∆∆∆∆
Instantaneous speed - the speed measured at a moment
in time
Constant speed - a condition which exists when the same
instantaneous speed is measured over a specific time
frame
For example:
If over a 5 minute period the speed was checked 3
times and each time the speed was the same, one
could say that this object had constant speed.
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