They keep you in your seat, and not thrown from the car, though the windshield, into the steering wheel, etc.
Yes.
Seat belts & air bags.
Well if you mean seat belts in cars its so you won't fly through the windshield in a car crash.
55%
Seat belts are important as they keep you from flying out the windshield or colliding with your steering wheel when in a crash. As you can imagine, this can result in fatilities.
You have to replaced both seat belt tensioners, anytime on most newer car the seat belt tension locks up renders the seat belt useless a safety feature, during front end crash when seat belts are used the tighten up during a crash to keep you from moving forward, after the crash the tensioner are useless and the seat belts have to be replaced.
I keeps you safe by not letting you fly out of the car if you are in the event of a car crash.
olden day cars have no safety belts
takeoffs and landings.
It is true that safety belts will keep you safe but will not protect you from drunk drivers.
A study by the University of North Dakota indicates that seat belts increase the chances of death during a crash to slightly over %87.
Safety belts during takeoff and landing and while en route; shoulder harnesses during takeoff and landing.