They are mainly for your safety. They keep you restrained in an event of a car crash, and keep people in the proper sitting position for a car. A improper position may make injuries occurring during an accident worse.
It's to stop the passengers from flying forward into the windscreen or the front seats if there is a collision and the car suddenly stops.
There are seatbelt extender available for both car and airline seatbelts
what do you mean early cars? bumpers and seatbelts and lots of steel.
To keep the occupants from being ejected.
1942
They were invented by Volvo (Latin for 'I Roll') in 1849.
January 1, 1968
When pigs can fly, that'll happen
Seatbelts are used to stop the forward momentum of your body when flung forward upon impact.
The cars have been built with seatbelts, comfy chairs and airbags that way if you crash you will have a little bit of protection.
Newer cars are equiped with new safety devices such as airbags, anti lock braking system, and seatbelts. Yes and older cars like my restoration haas no airbags
If the vehicle was built with seat belts you have to have them but if it didn't have the belts from the factory your not required to have them.
Everything has changed. From the type of materials used to make them lighter and safer and to the interiors that show you more about what the vehicle is doing. There are now safety devices including seatbelts and airbags to fuel injection systems. Nothing is the same as it was.