Tuesday, 18 April 2017

Speed

Hola, Maths professors!

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.

  • Speed limits on Singapore roads
  • 


     


    

    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.
     

    Three triangles show the three distance, speed and time equations. The first shows distance equals speed multipled by time, the second shows time equals distance over speed, the third shows speed equals distance over time.
    
     
    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?
     
    Image result for snail clipart
     
     
     
    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.

    

    No comments:

    Post a Comment