These features absorb energy when they change shape. This reduces injuries to the people in the car. Seat belts stop you tumbling around inside the car if there is a collision. However, they are designed to stretch a bit in a collision. This increases the time taken for the body's momentum to reach zero, and so reduces the forces on it. Air bags increase the time taken for the head's momentum to reach zero, and so reduce the forces on it.
They also act a soft cushion and prevent cuts. Why they work Seat belts support the body if a vehicle crashes or stops suddenly and prevents it being thrown from the car. A seat belt reduces injuries because it distributes that force to the chest and pelvis which are among the strongest parts of the body.
What's at stake? Aside from the safety issue, failure to wear a seat belt — or make sure passengers in the car are wearing one - will result in a fine, and demerit points in some places. There are still common myths about seat belt use, but they are easily busted by the facts.
Air bags are designed to work with seat belts not instead of them. Myth "A seat belt might trap me in the car if we crash. Safety Checklist To be effective, seat belts need to be worn correctly and in good condition.
A seat belt should fit snugly across the chest and shoulder, not across the neck or face never under your arm. CDC states:. Seat belts protect people from needless death and injury. CDC recommends effective, well-enforced seat belt laws to ensure that every person in every seat buckles up on every trip. According to the National Highway Traffic Safety Administration NHTSA , more than 15, lives are saved each year in the United States because drivers and their passengers were wearing seat belts when they were in a road traffic crash.
A seat belt:. CDC report that in the United States alone, in their study of seatbelt use from an estimated , lives have been. Seatbelts have saved an estimated over , lives since
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