The longer the impact time of an impulse, the smaller the force can be for the same momentum change, and hence the smaller the deformation of the object on which the force acts. On this basis, explain the value of air bags, which are intended to inflate during an automobile collision to reduce the possibility of fracture or death.
There is information in this which is at best misleading, and at worse wrong.
" and hence..." is just wrong (or misleading)
The air bag value is in deflation time, not inflation time. If a body presses against the inflated bag, it deflates slowly, lowering the force, and spreading it over a much larger area (instead over a golfball size area on the head against the windshield).
Consider time of deflation, the ability to spread over area, what that does to the pressure acting against a human body.
Pressure=total force/area= mass*changevelocity/(area*timeofImpact).
Lauren is awesome :)
pricks
Airbags are designed to inflate during an automobile collision to reduce the possibility of fracture or death by extending the impact time of the collision. When a car collides, the occupants experience a change in momentum. The force required to achieve this change in momentum depends on the duration of the impact.
By using an airbag, the impact time is extended, allowing the force to be spread over a longer period. This results in a smaller force acting on the occupants and the vehicle, reducing the likelihood of severe injuries or fatalities.
Understanding the concept of impulse helps explain the value of airbags. Impulse is equal to the change in momentum of an object and is calculated by multiplying the force applied on the object by the time over which the force is applied. Therefore, by increasing the time of impact, the force required to achieve the same change in momentum decreases.
Airbags work by using sensors to detect a collision. Once the sensors detect the impact, they trigger the inflation of the airbag in a fraction of a second. When an airbag inflates, it acts as a cushion between the occupant and the hard surfaces in the vehicle, reducing the force of impact on the body.
The extended duration of the impact provided by the inflated airbag increases the time over which the change in momentum occurs. This effectively spreads out the force of the collision, decreasing the likelihood of fractures or severe injuries.
In summary, airbags are valuable safety devices as they increase the impact time during a collision, spreading out the force and reducing the possibility of severe injuries or fatalities.