4-8 Speed (4.3 Discovering)

• Natuurkunde
• Middelbare school
• havo, vwo
• Leerjaar 2

Speed

Do 3 t/m 5 of discovering 

on p. 172

Paste a photo of your answer to the previous question

Speed

Speed is the distance you travel in a specific amount of time

In traffic we measure it in km/h (h comes from the latin word hora)

In science we work in m/s 

Speed - v (Latin velocitas)

Distance- s (Latin spatio)

Time - t

km/h to m/s /3,6

v=​t​​s​​

Speedometer

Speedometer in a car ...

GPS also measures distance and time ...

For very high speeds a high speed camera

can be used. It can record 1 000 frames per second.

Speed using radar and lasers

Laser - Flashing speed cameras use lasers.

The laser beam is reflected off the moving object.

The light then slightly changes colour.

This slight change in colour can not be observed

with the naked eye.

Radar - Radio waves are also reflected by 

moving objects.

Speed in a diagram

Speed-time graph ...

Speed of sound = 340 m/s

If you know this you can determine

how far a thunderstorm is from your position.

Questions p. 175

41-49