Everyday motion - OCR GatewaySeat belts

Every day people and vehicles travel at different speeds and are exposed to large accelerations and forces.

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Seat belts

Seat belts are worn when travelling in a car. When the car slows down suddenly (decelerates), each person in the car will experience a force exerted by their seat belt. If the deceleration is large, the seat belts may cause compression injuries.

Car safety features such as , and all work to change the shape of the car, which increases the time taken for the collision. This decreases the rate of change of momentum, which decreases the force of the collision on any people within the car.

Side view of a crashed car, showing the crumple zones and activated airbags.