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Newton's Three Laws Of Physics Essay

539 words - 3 pages

Newtons First Law
Newtons first laws states that :
"An object in motion tends to stay in motion
and an object at rest tends to stay and rest
unless acted upon by and outside force."

When in space, Newtons first law is very obvious. When an object in space is set on a course, it stays on that course unless it is acted upon by some outside force. Newtons first law is also present in every day life here on earth. The place where we may experience it the most is in our vehicles. If you are driving your car down the road and you come to a sudden stop, then you are going to go through the widshield unless you are wearing a seatbelt! The reason that you keep moving is ...view middle of the document...

This is an equation that is very familiar to those of us that wish to do well in any physics class! This equation tells us many things. First it tells us the net force that is being exerted on an object, but it also tells us the acceleration of that object as well as its mass. The force on an object is measured in Newtons (I wonder where they got that from). One Newton is equal to one (kg)(m)/s^2. For example, if superman pushes on a 10,000kg truck and it is moving at a rate of 2m/s^2, then the force that superman is exerting on the truck is 20,000N. For those of us that wish to move on in the field of physics, Newtons second law (F=ma) will forever haunt us!

Newtons Third Law
Newtons third law states that:
"For every action, there is
an equal and opposite reaction."

This law is very interesting. According to this law, when you push against a wall, it also pushes back on you. However odd this may seem, it is very important to us in everyday life. If this law was not true then the force of gravity would pulls us straight to the center of the earth. I think there are enough movies out there to convince you that plummeting to the center of the earth would not be a good thing! What then keeps us from getting pulled down there? It is a force called the normal force, this is the force that pushes up from the ground on our bodies. Now, if it were not for gravity then what would happen? Well we would all go flying off the earth, again, not a good thing! So to review, Newtons third law is what keeps our feet planted on the ground when we are walking around. What a wonderful law.

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