Top-Rated Free Essay

# Newtons Laws and the Car

Good Essays
779 Words
Grammar
Plagiarism
Writing
Score
Newtons Laws and the Car
Newton’s First Law – The law of inertia

Newton’s first law states that that moving objects tend to keep moving at the same speed and in the same direction or objects at rest will stay at rest unless and unbalanced force acts on it.

One aspect of a car that relates to Newton’s first law is how if a car a car will continue doing what its doing unless an unbalanced force is applied. For example a car parked in a driveway will not drive forward or reverse unless an unbalanced force is applied. When in motion a car travelling at 50m/s will continue travelling at 50m/s unless acted upon by an unbalanced force.

Another aspect of the car that relates to Newton’s first law is the head rests in the car. When you’re in a rear end collision the head rests help to prevent whiplash. Head rests help because when the car behind bumps into the rear of your car it creates an unbalanced force pushing the car forward but because there isn’t an unbalanced force pushing you forward as well, your body stays in the same position causing your body to push against the car seat. With out the head rest your head wouldn’t be supported and could cause serious neck injuries.

Seat belts are another example of Newton’s first law. If you are wearing a seatbelt when a car slows down, the seatbelt acts as an unbalanced force on you and therefore changes your state of motion so you’re the same as the cars. For example if a car is moving at 40km an hour, hits a brick wall and stops, you will still be going at 40km an hour. If a seatbelt isn’t being worn it you would be most probably be launched from the car and thrown through the air. This is because no unbalanced force has acted on you, just the car, so there was nothing to change your state of motion.
[pic]

Newton’s second law

Newton’s second law states that when an unbalanced force acts on an object it produces an acceleration in the direction of the force. The acceleration is directly proportional to the size of the force and is inversely proportional to the mass.

One aspect of a car is its engine. The force from the car engine provides an unbalanced force causing the car to accelerate, the bigger the engine is the greater amount of force can be applied to the car and therefore allowing the car to accelerate faster.

Because force is inversely proportional to mass, meaning the smaller the mass the higher the acceleration. The lighter the car the faster and easier the car can accelerate whereas the heavier the car the slower and harder it is for the car to accelerate.

An example would be if a truck bumped into a car. If the car was very light it would move forward quickly (higher acceleration) than it would if the car was heavier.

Newton’s third Law (Action – reaction)

Newton’s third law states that for every force there is an equal and opposite force. A car at rest will have 2 forces acting on it. Its weight pulls the car to the ground while the ground pushes back on the car with an opposite and equal force.

Another aspect is that on the car the wheels are designed to spin backwards, while they spin backwards they grip the road and push the road backwards. Mean while because of Newton’s third law, this force makes the road push the car wheels forward. The size of the force on the road is the same size as the force on the wheels and the direction of the two forces on the road and the wheel are opposite.

Every action there is an equal and opposite reaction. The person is pushing the car with a force of 100 N and a force of 100 N is going in the opposite direction so the car doesn’t move.

This law also shows how a car’s crumple zones work. When you crash into another car, your car hits the other car but also sends another force back onto your car. The crumple zones on the car are made soft so they absorb energy on impact, which helps to make the time that your car takes to stop completely spread out over a longer period of time. This means that your car slows down over a longer period of time, so the force acts over a longer time and the shock to your body is less.

## You May Also Find These Documents Helpful

• Satisfactory Essays

Newton’s laws of motion can be applied to any moving or resting object. For example, the movement of motor vehicles are explained by physics. The law of inertia states that an object at rest will stay at rest and an object in motion will stay in motion unless or until acted upon by a force. This can explain why when people don’t buckle their seatbelts, they are propelled out of the car, even though the car stopped moving. Newton’s second law of motion states that force is the product of mass times acceleration. Therefore, a heavier vehicle will fare better in a collision than a smaller lighter…

• 108 Words
• 1 Page
Satisfactory Essays
• Good Essays

Newton’s First Law of Motion explains that objects in a state of uniform motion tends to remain in rest unless an external force is applied to it. Galileo’s concept of inertia is termed “Law of Inertia”. Law of Inertia, an object in motion will continue in the same motion unless acted by an outside force. Aircraft in flight is an example of First Law of Motion, four forces on an aircraft; lift, weight, thrust, and a drag. Consider the motion of an aircraft at constant altitude, we can neglect the lift and weight, a cruising aircraft at constant speed and the thrust balances the drag of the aircraft. This is the first part sited in Newton’s First Law; there is no net force on the airplane and it travels at a constant velocity in a straight line.…

• 543 Words
• 3 Pages
Good Essays
• Good Essays

These laws helped others create several inventions and expanded the world's view on mechanics. For example, many amusement park rides began from Newton's laws of motion, roller coasters and Ferris wheels. One law states that an object in motion will say in that motion, unless acted on by an external force. For example, a roller coaster is made with hills so that the motion of the roller coaster won't be stopped by friction till the ride is over. Another law states that an object's acceleration is determined on the amount of force and the mass of the object. For example, if a person kicked a brick wall, it wouldn't move, but if the person kicked a balloon, it would move. Another example of the law is inside an engine; when the gasoline explodes in the cylinder of an engine, the force of the explosion forces the piston to move, which projects the machine in a direction. The final law of motion states that every action has an equal and opposite reaction. For example, a bird flies because it's wings push the air down, forcing the bird up into the air. An example of an invention for this law is the invention of rockets. A rocket is projected forward by an engine, while pushing the flames and exhaust backwards. These laws also helped English inventors create new inventions: the first internal combustion engine, the first electrical generator, the linear motor, the hydraulic crane, the…

• 905 Words
• 4 Pages
Good Essays
• Good Essays

The potential dangers of loose objects in vehicles are strongly associated with Newton's First Law of Motion, inertia.…

• 962 Words
• 3 Pages
Good Essays
• Good Essays

Newtons third law of motion, or the law of action reaction, states “every action has an equal and opposite reaction.”…

• 597 Words
• 3 Pages
Good Essays
• Powerful Essays

Isaac Newton’s Second Law of Motion (F=ma) explains the relationship between force and acceleration in motion. The application of force on an object causes an…

• 6862 Words
• 28 Pages
Powerful Essays
• Good Essays

Newton's first law is the first law that relates to my project, and the first law states that if an object is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at a constant speed unless a force is acted upon it.(Newton's laws of motion) For example, if there was a car going at 5 miles per hour in a straight line the car will remain going 5 miles per hour unless a force is acted upon it like if another car crashed into the car. Newton's third law is the other law that has anything to do with my project, and the third law states that when two objects interact, they apply equal forces to one another in magnitude and opposite in direction.(Newton’s laws of motion) For example when someone is pedaling on a bike the pedals and chain interact, applying an equal force to one another. That's why when you pedal faster you go faster. Overall, all the information suggests that my cars seem to have a better chance at going…

• 782 Words
• 4 Pages
Good Essays
• Satisfactory Essays

Newtons First Law states that objects at rest will stay at rest and objects in motion will stay in motion in a straight line unless acted upon by an unbalanced force. In this experiment the rocket would not have moved unless there was not an outside force. The outside force was alma-seltzer and water mixed together.…

• 455 Words
• 2 Pages
Satisfactory Essays
• Good Essays

3. Newton's first law for rotational motion states that an object will maintain its state of rotational motion unless acted on by an unbalanced (or net):…

• 943 Words
• 4 Pages
Good Essays
• Good Essays

5. Explain how Newton's first, second, and third laws apply to the performance of your vehicle.…

• 749 Words
• 3 Pages
Good Essays
• Satisfactory Essays

Newton’s first law was an object in motion will continue moving unless something stops it from moving. That law relates to my project by saying my contraption will stay in motion till it hit the ground. Newton’s second law was heavier the object the more force it takes to move and lighter objects require less force too move. The force in which the egg hits the ground will equal the mass of the egg. Newton’s third law is for every action of force there is an equal and opposite reaction of force. While moving downwards, the force of gravity is pulling the egg down. However, when the force is acting on the opposite direction too that’s due to air resistance.…

• 459 Words
• 2 Pages
Satisfactory Essays
• Good Essays

If we lived in a frictionless world (or in space), it would be easier to see Newton's First Law of Motion applied. Objects would always follow the Law of Inertia and resist change in their motion. But on earth we experience external forces like friction and gravity. Therefore, objects do not always keep in their rest state or continue moving at constant velocity, and in the real world the law does not hold perfectly true.…

• 908 Words
• 4 Pages
Good Essays
• Good Essays

Newton’s first law state that an object at rest will remain at rest unless acted on by an unbalanced force. For example, if a person was in space and put the rocket in the air out of their hands it would not move, if the person pushed the rocket, the rocket would not stop moving because there is no gravity (force) pulling it down and stopping it. So when launching the rocket where there is a force of both gravity and wind, the rocket will be pulled down to the ground and come to a stop.…

• 330 Words
• 2 Pages
Good Essays
• Good Essays

1.1.1 Newton’s Second Law of Motion . . . . . . . . .…

• 36731 Words
• 354 Pages
Good Essays
• Good Essays

Newton’s first law (law of inertia) for an object in mechanical equilibrium: An object at rest remains at rest unless acted upon by a force. An object in motion remains in motion, and at a constant velocity, unless acted upon by a force.…

• 1017 Words
• 5 Pages
Good Essays