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Functions of air bags

The Functions of air bags:

The functions of air bags are as follows can be understood in the light of laws of motion:

As we all know that moving objects have speed and impetus (the product of the mass and the velocity of an object). The object continues to move at its speed and motion unless some outside force acts on it. Vehicles contain several moving objects including the vehicle itself, loose objects in the car and, of course, passengers. If you cannot restrain these, they will also continue moving at whatever speed the car is itinerant at, even if the car is stopped by an accident.

For stopping an object’s impetus, a force is required over a period of time. When a vehicle meets with an accident, the objects still continue to move with the same speed Luggage, backpacks, briefcases, and more at

and momentum. Even the passengers and drivers sting in the vehicle just bang into whatever comes in front of them. This results in greater damage and loss of life. Thus, the force required to stop the momentum of the objects at the time of accident should be great and should prevent the damage. The target of supplement should be this.

Thus, air bags kits are made to slow the speed of the passengers, almost reducing it to zero,

causing little or no damage. However, it is easier said than done. There are a lot of constraints that these bags have to face -the space that is there between the passenger and the steering wheel or dashboard and the amount of time available to work with it. These bags can work even with a tiny amount of space and a fraction of a second but only if the system can slow the motion of the objects evenly instead of forcing of a sudden arrest of them. Luggage, backpacks, briefcases, and more at

There are three parts air bag that help to accomplish this deed. The bag itself that is, made of a thin, nylon fabric. This bag is folded into the steering wheel or dashboard or, more recently, the seat or door. The second is the sensors to produces nitrogen gas, which inflates the functions of air bag. This process is very fast, faster than the blink of an eye. Most air bags have internal tether straps that shape the fabric and limit the movement of the bag. Vents in the rear allow the bag to deflate slowly to cushion the head as it moves forward into the deploying air bag. The third component is the inflation system. This system reacts sodium azide (NaN3) with potassium nitrate (KNO3) to produce nitrogen gas. Hot blasts of the nitrogen inflate the air bag.


The early stages of development of these bags saw the exorbitant prices and technical hurdles giving rise to release of compressed gas. There were a few considerations that researchers were observing, such as whether there was sufficient room in a car for a gas canister, whether the availability of this gas lasts as long as the car lasts, how the bags can be expanded quickly and reliably at varying operating temperatures without releasing a deafening knock. They needed a technique that would produce the nitrogen that would inflate the bag. In 1970’s small solid-propellant inflators were thought of as the solution.