# Sir Isaac Newton's Three Laws Of Motion In A Car Crash

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Clarkson said “It 's not how fast you are travelling which causes serious injury in a car crash, but it 's how fast that you stop.” During a crash the severity depends of how fast you break. Velocity, acceleration and Newton’s three laws play a vital role during a car crash.
Sir Isaac Newton discovered the three laws of motion in 1686. Newton’s first law, or inertia, states that “an object at rest stays at rest and an object in motion stays in motion, with the same speed and in the same direction, unless acted upon by and unbalance force.” (Classroom, 1996-2016) Inertia describes the tendency of an object to repel any change in motion, and also states that an object with greater mass will have greater inertia. When an unbalanced force acts
In addition, 20-50 million people are injured or disabled. While seatbelts and other safety equipment plays a vital role in a car crash, momentum and velocity does too. Momentum, measured in mass x velocity, describes a large amount force that is created when an object has a large mass and/or high speed. For example, a car with greater momentum would be harder to stop than a small car. This is as, the momentum would be greater in the larger car. A collision describes the process in which two or more objects exert large forces on each other. Stopping time refers to the thinking and braking distance. Impulse describes the change in momentum, impulse = force X time. In collisions, momentum causes 'Inelastic Collisions ' and 'Elastic Collisions. ' Inelastic occurs when the total kinetic energy changes, but the momentum remains the same. During this type, the momentum is preserved, but the total kinetic energy isn 't, yet objects stick together after the collision. Elastic occurs when the kinetic energy and momentum remains the same and both objects would bounce away from each …show more content…
Since then many changes have been made to ensure the safety of passengers. Before 1956, car safety took a back seat. It was common for cars not to have seatbelts and to have razor sharp steering wheels, which during a crash would cut your chest and neck. Car keys would stick out, shattering your knee cap, glove boxes had razor sharp edges, which could cut a child’s neck, and the rear-view mirror was prone to split skulls. During 1956, seatbelts were invented and padding was placed inside of cars, to ensure further safety of passengers in the event of a crash. However, these cars were typically hard to sell, as consumers believed that they weren’t as safe. In the 1950’s the yearly death toll was rising to nearly 50,000 in America, and after Ralph Nader created a book about road safety, car manufactures believed they had to make changes. Although, many of them didn’t as they were focused on receiving profits, rather than on the safety of their consumers. In 1959, manufactures first started using 3-point-seatbelts, after Volvo created them. However, studies showed that passengers weren’t wearing seatbelts as they were “a pain in the neck.” Although, the governments decided that in 1983 everyone must wear a seatbelt, and the deaths dropped by 25%. In 1973, General Motors installed airbags. Nowadays, The Australasian New Car Assessment Program (ANCAP) has been invented, and aims to provide the public with safety ratings of cars. Crumple zones,

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