# Newton's Three Laws of Motion

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• Newton's Laws of Motion
• Objects at rest tend to stay at rest unless an outward force acts upon them/objects in motion tend to stay in motion unless an outward force acts upon them.
• Let's say a pencil is sitting on a desk. You don't touch it, so therefore a force isn't acting upon the pencil and it doesn't move. If you push it and it moves, it either A: Falls of the desk or B: you stop it with you hand In both ways, a force acts upon the pencil.
• The pencil would stay in motion until gravity, a type of force, acts upon it and stops it, or if you stop it yourself. If gravity didn't exist to make it halt, it would keep going on until another force acts upon it.
• The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
• Newton's Second Law of Motion
• When the mass is greater the force needed to move the object is greater as well. Which is easier to move, a book or a car? The book is! The book is easier to move because the book's mass, or how much matter inside of it, is less than a car's mass, so it would require less force to move it. The car would need to be pushed more because it's heavier An equation, or a problem, can be used to find the force needed to push an object
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