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1.03 The Laws of Motion

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**Newton’s first law of motion**

The first law of motion has two simple principles: An object at rest (not moving) will stay at rest unless an unbalanced force acts on it. An object in motion will stay in motion (in a straight line and at a constant speed) unless an unbalanced force acts on it.

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Newton’s second law Newton’s second law of motion states that the acceleration of an object depends directly upon the net force and inversely upon the mass

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Newton’s third law Newton’s third law of motion is all about the interactions between forces. Forces come in pairs that are equal but opposite. The third law of motion states that for every action (force applied) there is an equal and opposite reaction (resulting force) that will occur.

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**Assessment (choose one)**

Amusement parks are a great place to see Newton's laws of motion in action. Choose your favorite ride and describe the parts of the ride that illustrate each of Newton's laws of motion. Understanding the laws of motion can enhance performance in sport activities. Choose your favorite sport and describe where players use Newton’s three laws of motion to be successful. In the United States, car accidents are the leading cause of death for teenagers. Wearing seat belts helps save lives. Describe how Newton’s three laws of motion are used in testing the safety of our automobiles.

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