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

Earlier, it has been said that when a person is seated with a seatbelt, the person(s) within the vehicle and the vehicle itself moves as one. We can then say that the person is basically apart of the vehicle. This is where front and rear crumple zones comes in. Crumple zones are areas of the front and rear of the car that is easily collapsible. In specific areas of a car, engineers integrate variable grades of steel and fibreglass in the front and rear end of the car that allows the frame to buckle under stress and keep the passenger compartment intact. This means instead of the car coming to an abrupt and sudden stop when it hits another vehicle or object, it absorbs the kinetic energy produced by the car by collapsing. With a crumple zone, much of the kinetic energy is transferred into heat and sound energy resulting in a much smaller force being applied to the car and its passengers. This redirects the energy in the collision and reduces injury. The crumple zones are situat!

Some topics in this essay:
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,