Speed, uniform speed and average speed. Three topics which might confuse people. Actually, they are quite simple and are easy to understand. I will now explain them in simple terms.
What is speed? To put it in a typical Singaporean's terms, "speed is how fast something travels lor." However the real meaning according to Wikipedia is "the rate of motion, or equivalently the rate of change of distance"
Uniform speed is actually just constant speed if you are confused by the word. Just remember that your school uniform never changes so it is always the same. An example of uniform speed would be if a motorcycle was travelling at the same speed (50km/h) for 1 hour, the distance that he covered would be the speed he was travelling (50km). Of course this distance the motorcycle travelled starts only when it has reached 50km/h as it needs to accelerate.
The average speed of an object tells you the average rate at which it covers a certain distance. For example, if a bus is travelling at an average speed of 50km/h for two hours, it would have travelled 100km in that two hours.
To sum this up, speed is simply distance divided by time, distance is speed times time and time taken is distance divided by speed. Speed= Distance/Time, Distance=Speed X Time, Time= Distance/Speed.
Maths Joke:
Q: Why was 6 afraid of 7?
A: Because 7 8 9!
Explanation if you have no imagination: seven ate (Eight and ate? Geddit?) 9
sources:http://en.wikipedia.org/wiki/Speed,http://www.batesville.k12.in.us/Physics/PhyNet/Mechanics/Kinematics/AveSpeed.html
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