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# Sir Isaac Newton

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## Lindsey Hansen

on 18 February 2014

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#### Transcript of Sir Isaac Newton

Sir Isaac Newton
The Three Laws of Motion
Interesting Story
Sir Isaac Newton was born on January 4th, 1643, in Woolsthorpe (near Lincolnshire), England. Overall, Newton's childhood was not a very happy one. His father walked out when he was very young, so he was forced to grow up fatherless. His mother, Hanna Ayscough, then decided to leave him in the care of his grandmother, as she wanted a fresh start with second family. After the death of her second husband, Barnabas Smith (whom Isaac had a strong hatred for), Hanna returned to Woolsthorpe, but still denied Isaac of her attention. Many people suspect that is because of his childhood, that Newton was verging on emotional collapse throughout his whole
life.
Sir Isaac Newton 1642-1727
Physicist and Mathematician
By: Lindsey and Natasha
Diagram #1
Isaac Newton was sitting beneath an apple tree, reading a book. All of a sudden, an apple dropped from the tree and hit him on the head. When the apple fell, he understood that the very same force that brought the apple crashing toward the ground also keeps the moon falling toward the Earth and the Earth falling toward the sun: gravity.

Diagram #3
Diagram #2
One of Newton's greatest accomplishments was his invention of the three laws of motion. Newton's laws of motion are three physical laws that together laid the foundation for classical mechanics. They describe the relationship between a body and the forces acting upon it, and its motion in response to said forces. They have been expressed in several different ways over nearly three centuries.
The Law of Inertia
Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.
This basically means that a motionless object will not move on its own and it will only move if another force is applied to it.
The Law of Acceleration
Early Life
The second law explains how a force acts on a object. An object accelerates in the direction the force is moving in. The formula showing this law is F=m*a, or the force acting on an object is equal to the mass times acceleration
The Law of Reciprocal Actions
The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma. Acceleration and force are vectors (as indicated by their symbols being displayed in slant bold font); in this law the direction of the force vector is the same as the direction of the acceleration vector.
For every action there is an equal and opposite reaction.
#3
#2
#1
This means that for every force there is a reaction force that is equal in size, but opposite in direction. That is to say that whenever an object pushes another object it gets pushed back in the opposite direction equally as hard.
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