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===About Speed=Distance/Time===
: The standard scientific [[unit]]s for [[measuring]] '''speed''' are [[Metres per secondSecond|metres per second]] ([[m/s]]).
: The [[unit]]s of [[speed]] are given by the [[unit]]s of [[distance]] used and the [[unit]]s of [[time]] used in the calculation.
|-
| style="height:20px; width:300px; text-align:left;" |
distance = 300[[m]]300m
time = 120[[s]]120s
<math>Speed = {\tfrac{distance}{time}} </math>
<math>Speed = 2.5m/s </math>
| style="height:20px; width:300px; text-align:left;" |
distance = 500[[m]]500m
time = 10[[s]]10s
<math>Speed = {\tfrac{distance}{time}} </math>
|-
| style="height:20px; width:300px; text-align:left;" |
distance = 2.4[[km]] = 2400[[m]]2400m
time = 20[[min]] = 1200[[s]]1200s
<math>Speed = {\tfrac{distance}{time}} </math>
<math>Speed = 2m/s </math>
| style="height:20px; width:300px; text-align:left;" |
distance = 42,000[[km]] = 42,000,000[[m]]000m
time = 20[[min]] = 5400[[s]]5400s
<math>Speed = {\tfrac{distance}{time}} </math>