| Sir Isaac Newton! | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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1 Isaac Newton was born in 1643. His family had quite a bit of money, so he was pretty advantaged. Yet in other ways, he had disadvantages. His father had died before he was born, so he was raised by his grandmother and other relatives. In school, he rarely paid attention, and his teachers described him as lazy and disinterested. It was only after an uncle encouraged him to prepare to go on to college that he began to take an interest in school! One of the skills he developed while still in school was making model machines, including clocks and windmills. In college he began studying a lot about 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). 5 Law 3 - For each action, there is an equal and opposite reaction. 6 The three laws of motion make more sense if you complete experiments that demonstrate each law. Maybe Sir Isaac completed similar experiments while testing theories for each law! 7 The first law can be demonstrated by an old trick where you pull the tablecloth from under dishes on a table. If you do it just right, you will remove the tablecloth without causing the dishes to crash to the floor. Objects at rest, like the dishes, will stay at rest. 8 To demonstrate the second law, you can try hitting two baseballs. If you hit two baseballs (one being one pound and the other being five pounds), the five-pound ball would fly slower through the air because it has a greater mass. That means it is larger, which of course means it weighs more. On top of that, if you hit the ball harder, it would accelerate more than if you tried to bunt it. 9 Newton’s third law of motion again states that for every action, there is an equal and opposite reaction. We experience this law in many different ways every day. If a gymnast were to flip through the air and land on the mat, his or her feet would sting. This is because the gymnast’s feet would exert a force on the ground but the ground exerts a force back on the gymnast’s feet, causing them to sting. 10 There are several exciting experiments you can do to learn about the Laws of Motion, and over time, you’ll be able to complete more experiments that will help you to learn more about it.
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Copyright 2005 Ms. Jasztal and class. All rights reserved.
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