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Forces and Motion
 Newton's Three Laws of Motion

Newton's Three Laws of Motion
Reading Level
     edHelper's suggested reading level:   grades 6 to 8
     Flesch-Kincaid grade level:   6.62

Vocabulary
     challenging words:    formula, inertia, wealthy, testing, born, amusement, mass, cause, action, acceleration, interesting, died, develop, ruler, equal, math
     content words:    Isaac Newton, Sir Isaac Newton, Sir Isaac, Maybe Sir Isaac

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Newton's Three Laws of Motion
By Sharon Fabian 		  
1     Isaac Newton was born in 1643. His family was wealthy, so in some ways he had advantages over other kids his age, but in other ways he was disadvantaged. Isaac's father had died before Isaac was born, and he was raised by his grandmother and other relatives. At first he probably was not encouraged to learn much in school. He didn't pay attention in school, and was described as lazy. It was only after an uncle encouraged him to prepare to go on to college that he began to take an interest in school and to develop his talents. One of the skills he developed while still in school was making model machines, including clocks and windmills. In college he began studying the latest theories in math. Soon he was coming up with theories of his own, and today Sir Isaac Newton is well known for his three laws of motion as well as for other scientific breakthroughs.
 
2     Here are Sir Isaac Newton's three laws of motion.
 
3     Law 1 - An object moving in a straight line will continue moving in a straight line, unless acted on by an outside force. Also, an object at rest will stay at rest. The word for this is inertia.
 
4     Law 2 - Force will cause a change in the motion of an object. The change in motion depends on the amount of force and the mass of the object. There is a formula for this F=ma (force equals mass times acceleration).

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