Why car seat belts play a protective role

When properly fastened, it can apply most of the stopping force to the chest and pelvis, which are relatively strong body parts. Because the seat belt spans a wide part of the body, the force is not concentrated in a small area and therefore does not cause excessive injury. In addition, the material used for seat belts is much softer than the dashboard or windshield. It can stretch slightly, which means that the stop process is not too abrupt. However, seat belts should not be stretched too long, as this could cause you to crash into the steering wheel or side windows. The seat belt only allows you to move forward slightly.