supplementary restraint systems
Airbags are designed to be used only once.
No, an air bag will only protect you as designed if you are ALSO wearing a seatbelt.
they relate to the theory behind Momentum and Impulse
Not necessarily. The airbags are designed to activate during any crash that exhibits enough force to trigger the mechanism. Even a small impact can activate the airbags. It certainly doesn't mean the car is unusable - the used airbags can be simply replaced at a garage.
No, they do not have airbags
No, you do not have to buy airbags for your car. The airbags will come automatically when you buy your car.
Front Airbags: The first ones were installed for drivers and come out from the steering column. Some will have passenger-side front airbags. Side torso or window: These airbags cushion both front and rear passengers from the side. Torso airbags are usually in the rear seat and inflate between the passenger and his door; curtain airbags inflate across the window from the roof. Knee airbags: Designed to help prevent injury to the driver's legs. Rear: Rear curtain airbags cover the back window and rear center airbags cushion passengers from one another during an impact. Sometimes there are separate curtain airbags for front and rear passengers; sometimes one large curtain that runs the full length of the vehicle is installed.
the airbags in the lungs are for transferring oxygen into the capilliaries
Yes, airbags can be removed and replaced.
airbags on the sides of the doors of the car.