Car Safety
Car safety is something which is extremely important because the roads which we drive on are much more dangerous than we think. You might think you are a safe driver, and maybe you are, but how about other drivers? Each and everyday, hundreds of thousands of cars are on our roads making the chances of a car accident very likely. That is why car safety is so crucial. You might think such an important thing as car safety should be mandatory, well it is now, but 50 or so years ago, seat belts, airbags and front/rear crumple zones were not. Seatbelts were first thought of in the 1930's by US physicians and only in the 1950's did countries require newly built cars to have seatbelts fitted and finally in 1969, 3-point seat belts were mandatory in Australia. The reason why we have seat belts are simple. They keep us from hitting the interior of the car, flying head-first into the windscreen or even smashing through the windscreen in the event of car crash or if it comes to an instant stop. You might say 'wouldn't we stop as the car stops?' Well, according to Newton's First Law of Motion, The Law of Inertia, that's not the case. Inertia is an object's tendency to keep on doing what it is doing/moving and at its speed un
Crumple zones also works according to Newton's Laws. As the car hits another object, it will cause it to come to a stop or slow down (1st Law/Law of Inertia). The car has a certain amount of force, which is calculated by Newton's 2nd Law; the product of the mass and its acceleration. Because the force can be lessened by extending the time interval by making the crumple zone collapse instead of an instant collision, the time for it to collide is prolonged. By doing this, the force is lessened (impulse). Now it is time for Newton's 3rd Law to come to play its role. If the force of the car is lessened through Newton's 2nd Law and impulse, then the equal and opposite force that is exerted (3rd Law) will also be less. The purpose of crumple zones is to minimise as much of the energy as possible during the crash so a minimum amount of force is transferred to the passenger(s) inside the vehicle.
Some common words found in the essay are:
Law/Law Inertia, Law Motion, A' Body, , Motion Seatbelts, Conclusion Car, Law Inertia, War II, Newton's Laws, car safety, Motion Physics, crumple zones, 2nd law, equal opposite, newton's 2nd, opposite force, equal opposite force, newton's 2nd law, front rear, 3rd law, unbalanced external force, persons inside, inside vehicle, 2nd law impulse, equals mass final,
Approximate Word count = 1495
Approximate Pages = 6 (250 words per page double spaced)
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