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Seat Belts and Safety Systems
Timing Belts and Chains

Why are seat belts used in cars and airplanes?

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11/30/2009

Answer

So if there is an impact of some sort you are restrained to your seat, therefore minimizing injury.

Answer

Simple. It's called inertia.

In airplanes they are to keep you in your seat in case of severe turbulence or... the plane takes a nose dive (you don't want to be at the bottom of a pile of people thrown to the back of the plane when you crash, do you?)

In cars, it's even simpler. You are moving along at say, 45 miles an hour, and hit something that brings your car to a dead halt.... however your body (and anything unsecured in the car) will keep moving at 45 miles an hour until it hits something that makes it stop. Wouldn't you rather that something be a seat belt and not the windshield that will slice your face up like salami?

Answer

Seat belts are used in cars and airplanes because if there is a crash, you won't fling forward and crash any part of you body. You might move slightly forward, but you won't crash you head with a bang.