Main content
How to calculate the speed of a car
The presenter talks to a policeman about how the speed of a car is calculated. They look at how fixed marks and known distances are used to calculate speed. This is done by measuring the time it takes a vehicle to travel the known distance, and then using the formula, 'speed = distance/time', to calculate the speed. This same method is used on the two pictures from a speed camera, which show how many fixed marks a vehicle passes in half a second.
Duration:
This clip is from
More clips from Physical Processes
-
![]()
The force, pressure and surface area of stinging nettles
Duration: 02:07
-
![]()
Why do you feel lighter in water?
Duration: 00:46
-
![]()
Resistance of different materials
Duration: 01:11
-
![]()
The relationship between force, pressure and surface area
Duration: 02:51
More clips from Science in Action
-
![]()
Neutralising acids and alkalis—Materials and Their Properties
Duration: 00:32
-
![]()
Why do you feel lighter in water?—Physical Processes
Duration: 00:46
