Distance travelled per unit time .
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Average speed is total distance divided by total time. Hence 10 metres in 6 seconds is an average speed of (10/6) = 2.66666 m/s. Notice the units of speed - if you ever forget that speed is distance over time, just remember speed's units is something like metres per second, miles per hour etc. "per" means divided by.
Simply remember this triangleD-----------S x TThe D represents DistanceThe S represents SpeedThe T represents TimeDistance divided by Time = Speed. (120 miles divided by 2 hours = 60 mph)Distance divided by Speed = Time. (120 miles divided by 60 mph = 2 hours)Speed multiplied by Time = Distance. (60 mph x 2 hours = 120 miles)
An easy way to remember how to do these is to think about the units:Speed = kilometers / hourNow plug in the values you know:Speed = 1.2 km / .1 hourSpeed = 12 km/hour
Speed equals distance over time as in whatever the distance in the problem is, you divide it with the time in the problem. For example...bob ran 20 miles in 4 hours. What is his speed? So you get 20 over 4. 20 divided by four is 5 so his speed was 5 miles per hour. 5m/hr. speed = distance/time
Well, isn't that just a happy little question! The speed of a car is how fast it's going in miles per hour, just like a gentle breeze through the trees. It's important to drive safely and always follow the speed limit to keep yourself and others on the road safe. Just remember, there are no mistakes, only happy accidents!