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Airbags are designed to deploy only when they might be needed to prevent serious injury. In order for airbags to be effective they must deploy early in a crash; in a frontal crash this typically occurs within the first 50 milliseconds (0.05 seconds). A vehicle's airbag control module relies on feedback from crash sensors to predict whether an event is severe enough to warrant an airbag deployment.
Frontal airbags: Frontal airbags are designed to inflate in moderate to severe frontal crashes. Among airbags with advanced features that include a safety belt sensor, there are different inflation thresholds depending on whether people are using their safety belts. One threshold used by airbag designers is "must deploy" which includes a situation such as an impact into a rigid wall of 10-12 mph for unbelted occupants. The "must deploy" threshold is slightly higher - about 16 mph - for belted occupants because the belts alone are likely to provide adequate protection up to these moderate speeds. Frontal airbags may deploy to help protect occupants in side impacts if there is sufficient forward deceleration during the crash. For example, if a vehicle is moving forward at the time of a side impact, frontal airbags can help prevent serious injuries.
Advanced airbags compliant with government crash performance standards have been required in all passenger vehicles effective with model year 2007. Advanced airbags are designed to suppress deployment if weight sensors in the seat detect that a front-seat passenger is small or in a child safety seat. Advanced airbags also can deploy at a lower energy level or pressure when passengers are small or out of position, or if the crash is of very low severity.
Side airbags: Because of the small space between an occupant and the side of the vehicle, side airbags must deploy very quickly to cushion occupants from intruding vehicles or objects. Some airbags typically deploy within the first 10-20 milliseconds of a side crash. "Must deploy" thresholds can be as low as 8 mph for narrow object crashes (e.g., trees and poles) and 18 mph for the more distributed side crashes (vehicle-to-vehicle crashes). Several auto manufacturers deploy the side airbags in frontal crashes to help control occupant movement during the rebound phase of a crash. Some curtain side airbags may stay inflated longer to protect occupants in rollover crashes. Allowing the airbags to remain inflated or triggering their deployment during a rollover can help prevent full or partial ejection of occupants.
Curtorsey: Institute for Highway Safety
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What do air particles do to cause air resistances?
When a parachutist is falling with his parachute open, he is hitting air molecules. Imagine he is going at 1 cm/s, he is hitting 1 cubic cm of air molecules per second. If he goes at 2 cm/s, then he is hitting 2 cubic cm of air per second. This increases the air resistance. So as his speed increases, so does the amount of cubic cm of air molecules.
What is another word for In the open air?
in the open air
What would happen to satellite if it lost its speed?
It would eventually fall into the Earth's atmosphere and burn up on reentry However, it is unlikely that it would lose speed without hitting another object. It will not slow down because there is no air, therefore, no air resistance.
What is an air sock?
An air sock is another name for a windsock, a conical open-ended tube designed to indicate wind direction and relative wind speed.
Speed to open the air bag?
It depends on what you crash into , a solid concrete wall with no " give " or another vehicle , the collision has to have enough " force " to require the air bag(s) to inflate
Why is air compressed when an object is traveling faster than the speed of sound?
The supersonic object is hitting air molecules faster than they can get out of the way, so they pile up.
How do aircraft measure their speed?
Aircraft measure two kinds of speed, air speed and speed over ground. Air speed is measured by the flow of air one way or another. Speed over ground can nowadays easily be measured by GPS. Or the Old fashioned way of checking the time it takes to pass from one land mark to another.
Can you get anurisms from air hitting skin?
No
Explain why friction increases as speed increases using the big idea of particles?
The faster you go, the more air you have bashing into your surface. Imagine the molecules comprising air were the size of basket-balls. at walking speed, you'd only have 5 or 6 basket balls hitting you in the face every minute or so and they'd only hit you at walking pace. When you move up to running speed, you suddenly have 15 or so basket balls hitting you in the face every minute at running pace. Riding on a bicycle, you have between 30 and 40 basket balls hitting you in the face every minute at a very high speed. So the faster you go, the more basket balls you have hitting you at a higher speed. These two factors multiply together to give the friction force which increases as a square factor of your speed, (i.e. increase speed by 2, you have 2x the basketballs hitting you 2x as fast which equals 2x2 = 4 times the friction force). I hope this explanation is adequate. Cheers. by Umar siab:)
What do air particles do to cause air resistance?
The molecules in air is matter and matter has a weight. Atmospheric air weighs 1.3 kg per cubic meters. It is also called friction. Friction is something that slows you down or stops you as you move, for example air and a wall. In space there is a vacuum. Vacuum means that there is nothing any where at all. In other words, no air resistance or resistance of any kind/no friction.
How does soil heat and cool?
it will heat up by sunlight hitting it it cools by cool air hitting it
Most meteors that fall into the Earth's atmosphere burn up before reaching the ground. Why is this?
They are hitting air molecules at a high speed and breaking them apart, which produces a lot of heat.
