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Physics Section A : Car Safety

Part 1: Information

Car Stopping Distances

Several factors affect the stopping distances of a car. These are mainly:

  • The driver

  • The condition of the car

  • The condition of the driving surface

The time needed to stop a car = thinking time + reaction time + braking time

This site gives information about reaction times: Internet site link

 

Car Crumple Zone

This zone, is usually, just at the front of a car. Its purpose is to absorb the energy of an impact, say, a car hitting a wall. The crumple zone, crumples, and so in doing so the car takes longer to come to a stop, which is better for the passengers inside.

Look at the video in this site, showing an old car with no crumple zone. Internet site link

This site gives more information on crumple zones: Internet site link

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