Posted by Ruby on Wednesday, July 16, 2008 at 10:14pm.
Without the seat belt, the air bag must exert almost all of the force on the driver to decelerate him/her. Without a seat belt, the driver will have a higher force exerted on his/her head, may hit the windshield, or be thrown to an area that is not protected by the air bag.
this answer is correct but i need the mathematical law needed to solve this problem.
There is no single law to quote that explains why it is important to wear a seat belt even when an air bag is present. It is a question of keeping the person behind the air bag and distibuting the decelerating force between the seat belt and the air bag.
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