# The Physics of Car Safety Systems Essay

1105 Words Jun 28th, 2013 5 Pages
The Physics behind Car Safety Systems
By changing an object’s momentum, we are able to move it either faster or slower, and eventually to a halt, depending on the amount, direction, and magnitude of the force that acts upon the object. By applying this aspect on a car’s safety systems, we are able to either reduce the risks of injuries as the results of a crash, or to avoid a crash completely. It is with this principle that seatbelts, crumple zones, air bags, and braking systems, among other features, are able to save us from such unfortunate events.
Seatbelt – an active safety feature
In America alone, seatbelts have saved an approximate of 13,000 lives each year. Furthermore, an estimate of 7,000 fatalities could have been helped if
Without lamination, the glass would shatter just as a window would. The glass layers apply force to the plastic, which then applies an equal amount of force on them. This force holds together the shards, making them stick with the plastic. By keeping them from flying off, the momentum of the glass shards is reduced to minimum amounts, keeping the passenger safe from the shards.
Airbags – active safety features.
Airbags has, statistically, reduced the chances of morality in accidents involving cars by as much as thirty percent. Airbags are commonly located on steering wheels, in front of passenger seats, on the seats themselves, in the doors, the knee areas, and even outside, near the windshields, to partially protect pedestrians who may have been hit by the vehicle. As mentioned, a person or object involved in a crash would continue to move at the same velocity unless there is unbalanced force acting on the object for an extent of time. This force, in this case, is supplied by the airbags. By Newton’s second law of motion (for every action there is an equal and opposite reaction), when a person exerts their velocity on an airbag, the airbag would exert an equal amount of force against the person’s velocity. This gradually decreases the person’s velocity and momentum, which in result blunts the collision and risks of death or physical injury.
Crumple Zones – active safety features
Crumple

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