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Issues Investigation: Car Safety

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ISSUES INVESTIGATION
CAR SAFETY DEVICES
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By Ihron Mather
Introduction
The roads are a dangerous place with the issue being the safety of people being the main concern, and what is being manufactured to prevent injuries and how do they work. Due to the advance in today’s technology they are becoming safer with every advancement in this field. Physics also plays a large part in the discovery of these devices that save the lives of everyday passengers. Inertia is a measure of a body’s tendency to resist any changes in its motion, which is the measurement of mass. While momentum refers to moving things, where (P) is the product of the mass of an object and its velocity. Force is a push or pull upon an object resulting from the object’s interaction with another object, where force is equal to the change in the change in momentum divided by the change in time, measured in Newtons (N). Acceleration is the rate of change in velocity, measured in in m/s/s. The Law of Conservation of Momentum states that in the absence of a net external force, the momentum of an object or a system of objects remains the same. A large momentum and short amount of time will result in a larger force, the same works in the opposite direction, this is where car safety devices come into play.
Active Car Safety Devices
Active car safety devices work to preclude or avert the chances of an accident while on the roads. Through today’s technology there has been a great leap into the evolution to the how people are kept safe while inside a potential accident on 4 wheels.
Anti Lock Braking System (ABS)
As the main focus for an active safety feature the anti lock braking system (or ABS) ceases the effects of skidding allowing the driver to remain in control of the vehicle. Due to the large disappearance of friction between the tire and the road the vehicle becomes much more difficult to operate. The tires require the wheel to be rolling in order to slow down and speed up. The ABS work to prevent the wheels from locking up by maintaining the kinetic friction in the wheels so that it prolongs the change in momentum, which leads to less force being required to lead the vehicle to a complete halt (Maggie F, 2015).

Passive Car Safety Devices
Quietly waiting to activate themselves when there is danger of an crash, passive car safety devices work as little passive heros in a driver's time of need. They are wired to react faster than a blink of an eye with the sole intention of protecting the driver from any harm.
Crumple Zones
Crumple zones are attached to the front and rear of the car they are known to passively wait for a collision to occur. In an event of an emergency the metal located in the areas stated will retract, bend, fold to decrease the force acting upon the car and the people inside the vehicle. In doing this the time for the car to stop is increased (gcsescience.com, 2015). By absorbing the kinetic energy the forces undergo a great change in momentum therefore reducing the injury that can be brought the passengers. By their design the vehicle goes through what is called a controlled as the collision is controlled via the crumple zones (bbc.co.uk, 2015).
Air Bags
Air bags act as pillows to prevent victims from injuries. They are passive safety features that are installed in every car. Activating as fast as an apple fan’s response to buying the newest iPhone. These cushions of protection inflate, together with the aid of the seat belt to increase the amount of time for the passenger’s body and head’s momentum to reach zero (gcsescience.com, 2015). In increasing the time they reduce the total force of impact therefore creating a great change in the momentum.
Conclusion
The world would indeed be a better place if there were a fewer casualties on the road. There are a plethora of reasons for accidents occurring, and it has led to the loss of millions of lives. However the world has advanced so far to develop mountains of safety devices and features that work to the prevention of accidents and the loss of life. An issue that concerns drives is they do not take into consideration that seats belts are installed to keep your body safe. A revolutionary device that could potentially counter the acts of lazy drivers. The introduction of censores that are installed within the belt buckle. They work to prevent the operation of the engine, therefore every time the driver tries to start the ignition it will not cooperate. In applying this upgrade it can enforce the underlying duty that multiple drivers and passengers fail to comply with .But remembering that they aren’t the only devices that work to keep people alive for days to come, there are numerous amounts of safety devices that serve that single purpose, keeping us safe.

Word Count: 815
Bibliography
Bbc.co.uk, (2015). BBC - GCSE Bitesize: Car safety features. [online] Available at: http://www.bbc.co.uk/schools/gcsebitesize/science/add_ocr_gateway/forces/crumplezonesrev3.shtml [Accessed 29 Oct. 2015].
Brainonboard.ca, (2015). Safety Features: Active safety features. [online] Available at: http://brainonboard.ca/safety_features/active_safety_features.php [Accessed 29 Oct. 2015].
Car Safety- Physics, (2015). Physics of Anti-lock Brakes- How they work. [online] Available at: http://carsafetyphysics.weebly.com/physics-of-anti-lock-brakes--how-they-work.html [Accessed 29 Oct. 2015].
CarAdvice.com.au, (2015). Passive Car Safety Systems – A Passive Attack! | CarAdvice. [online] Available at: http://www.caradvice.com.au/52702/passive-safety-systems/ [Accessed 29 Oct. 2015]. ce.org, (2015). Active Safety Devices. [online] Available at: https://www.ce.org/Consumer-Info/Car-Electronics/Want-It/Active-Safety-Devices.aspx [Accessed 29 Oct. 2015].
Fc.codmanacademy.org, (2015). Impulse & Momentum - The Physics of Driving. [online] Available at: http://fc.codmanacademy.org/branches/physicsofdriving1/index.php?module=pagemaster&PAGE_user_op=view_page&PAGE_id=5&MMN_position=5:5 [Accessed 29 Oct. 2015].
Gcsescience.com, (2015). GCSE PHYSICS - The Change in Momentum and Car Safety - How do Crumple Zones, Seatbelts and Airbags reduce the Forces in a Car Crash? - GCSE SCIENCE.. [online] Available at: http://www.gcsescience.com/pfm46.htm [Accessed 29 Oct. 2015].
Howsafeisyourcar.com.au, (2015). Antilock Braking System | How Safe Is Your Car. [online] Available at: http://www.howsafeisyourcar.com.au/Safety-Features/Safety-Features-List/Antilock-Braking-System [Accessed 29 Oct. 2015].
Physicsclassroom.com, (2015). The Meaning of Force. [online] Available at: http://www.physicsclassroom.com/class/newtlaws/Lesson-2/The-Meaning-of-Force [Accessed 29 Oct. 2015].
Plastics-car.com, (2015). Physics in the Crumple Zone | Plastics Helps Save Lives. [online] Available at: http://www.plastics-car.com/Todays-Automobiles/Automotive-Safety/Physics-in-the-Crumple-Zone-2.html [Accessed 29 Oct. 2015].

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