Fig. 4-6 The driver who wears a seat-belt (right) collides with the windscreen in an accident. The driver who wears a seat-belt is protected by it.

When a car crashes, the passenger will tend to continue his forward motion at a high speed due to inertia. The passenger will crash into the front part of the car and get injured seriously. A seat-belt can protect the passenger. A seat-belt slightly stretches in a collision, thus it can lengthen the time during which the passenger decelerates and greatly reduce the impact force.

Flash animation: How can a seat-belt protect a car passenger?

Activity: Seat-belt and car safety


Article Reading and Class Presentation

  1. Read the article "The science of seat belt" in the website
    and make a short presentation on how seat-belts can help to prevent internal injuries.