5.2 Average speed

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• Middelbare school
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• Leerjaar 2

5.2 Average speed

https://www.youtube.com/watch?v=EfLLkGjBKog

Definition of Speed:

Speed is the distance an object travels per unit of time. It tells us how fast something is moving. The formula for speed is:

Speed = Distance / time

Example:

If a car travels 100 kilometers in 2 hours, the speed is:

100 km / 2 hours = 50 km/h

​

So, the car's speed is 50 km per hour.

 

 km

2

 hours

=

50

 km/h

2 hours

100 km

​

 =50 km/h

So, the car's speed is 50 km per hour.Tekst

Average speed: is the total distance traveled divided by the total time taken. 

It is used when an object moves at different speeds during a journey. 

The formula is:

Average Speed = Total Distance / Total Time

Example: A cyclist travels 30 km in 2 hours and then 20 km in 1 hour. 

The total distance is 30 + 20 = 50 km and 

the total time is 2 + 1 = 3 hours.

Average speed = 50km/ 3hours =16.67 km/h

So, the cyclist’s average speed is 16.67 km per hour.

V,t diagram: the speed is increasing regularly. 

Your graph is a straight line. 

t= 2 seconds v = 5 m/s; 

t= 4s  v= 10 m/ s and 

t= 6 s  v= 15 m/s