Let's learn more about speed.
Speed is a special kind of rate. When an object is moving, the speed of the object is the rate of distance covered per unit time.
In a nutshell, speed is the distance travelled per unit time.
Do remember the following three formulas well.
Note that the units used in D, S & T must correspond to one another.
Here's a video to help you remember how to get the formulas...
Oh yes! Just a question.
There are many different types of units that can be used for speed e.g. m/s, km/h, m/min, cm/s
How do we know when which units are more appropriate?
And now, it's time to learn about the amazing wonders of Mother Nature! :)
The speeds indicated in the video above is the average speed. This is because the speed throughout a journey may not be constant all the time.
Average speed = total distance covered ÷ total time taken
The average speed is not the sum of two speeds divided by two.
The average speed is not the sum of two speeds divided by two.
Our Task
1) Time your journey home from the same starting point in our school.
2) Record the time taken (duration).
3) Find the distance travelled using Google map.
4) Calculate the average speed of your journey.
5) Repeat steps 1 & 4 the next morning while you are on your way to school.
Have fun & we look forward to hear you share about your experiences! :)
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