5.2 Average speed (Lesson 2)

• Natuurkunde
• Middelbare school
• vwo
• Leerjaar 2

Speed, distance & time

Speed	Time	Distance
10 km/h	1 h
10 km/h	5 h
50 km/h	3 h

Speed, distance & time

Speed	Time	Distance
10 km/h	1 h
10 km/h	5 h
50 km/h	3 h

What do you notice?

What do you think that the
formula should be?

The formula

For constant speeds, we have the following formula:

v is the speed in meters per second (m/s)

s is the distance in meters (m)

t is the time in seconds (s)

v=​t​​s​​

The formula

For constant speeds, we have the following formula:

v is the speed in meters per second (m/s)

s is the distance in meters (m)

t is the time in seconds (s)

v=​t​​s​​

Eliod Kipchoge

On October 12th 2019, Eliod Kipchoge became the first human to complete a marathon 

(42.195 km) in under 2 hours!

What was his average running

speed? 

Use 1 hour and 59 min as his

finishing time.

What was the average running
speed of Eliod Kipchoge?

For now:

Take out your Calculator and go and try to the skill trainer of 5.2