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Newton Laws of Motion
Transcript of Newton Laws of Motion
This picture is an example of the third newton law. The third newton law is also known as the law of action and reaction. It's known for that because for every action there is a reaction. In the photo above shows how the man is applying force to the brick wall. But the question is: why doesn't the man go through the wall? The man putting force to the wall is the action force and the wall not breaking and staying still is the reaction force given by the wall to the man. It does not move because the wall is giving the same amount of of force that the man gave the wall.
The Newton Laws
The First Law of Motion
The Second Law of Motion
The Third Law of Motion
This first newton law is also known as the law of Inertia. It's known as the law of inertia because inertia is when the object is either at rest or in motion at a constant speed and direction. This law of motion is when an object in motion can stay in motion at the same speed and direction until an external force is applied. Or, an object can stay at rest until an external force is applied. The meaning of inertia is what the first newton law is about.
What is inertia? Inertia is when an object is either at rest or in motion at a constant speed and direction. The car above is at rest. The photo shows the first newton law being applied. When the man applies force to the car after the car being at rest, the car will no longer be at rest. The force that the man is applying to the car is the external force that will cause the object to no longer be at rest, but in motion. The car will now be in motion until an external force stops it.
The second law of motion mostly depends on the mass of the object to see how much force will be needed to be applied in order to accelerate. So the greater the mass of the object that is being accelerated, the greater amount of force will be needed. The equation for this law is: Force= Mass times Acceleration. That is why we need to know the mass and how much we want to accelerate to know how much force to put on an object.
The picture above is showing a lot of the second law. The boy with the yellow hair is using a lot force in order to pull the big rock because it has a lot of mass. However, the boy in the brown hair is using less force to pull the lighter rock that has less mass. So, if the boys changed places and made the same force to the different rocks, the blonde boy would be able to pull the rock more than he needs to because he's applying the same force he applied to the big rock and is now using it to pull a small rock. The boy in brown hair would not be able to pull the heavy rock at all because he is using the force he used on a small rock to pull a big rock. That is why the picture above shows a lot of the second law.
In this photo, the second law of motion is being used. The man in the hat will push both people that are on the swings using the same force. He will try the little girl first. Since the girl doesn't have a lot of mass, it will not be hard for the man to push her. The man will not have to apply much force. However, when he pushes the other guy, the man will not be able to apply the same force to the guy as he did with the girl, because then he will not move the guy as much as he moved the girl. Instead, he will have to apply a lot of force because the guy has more mass than the girl. That is why the second law is used in this photo, because it shows that the force you apply on an object depends on the mass on the object.
The third newton law of motion, is the law that explains that for every action there is an equal and opposite reaction. For example, when an object pushes another object, that object will be pushed back with the equal amount of force that the object had pushed the other object with. That shows that the force that the first object had put to the second object reacted to the first object as well, and with the same amount force.
What is the couple doing? They are showing how the third law of motion works! The couple are holding hands. They are also ice skating so there is less friction on the ice. Since they are pushing to each other, the girl will go backwards depending on the amount of force she put towards the boy or the amount of force the boy put on her. But, since this is the third law of motion, the girl is not the only one that will be pushed backwards but also the boy will be pushed backwards depending on how much force the girl put on him or how much force he put on her. That is how the couple shows the third law of motion.