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8.6C NEWTON’S LAWS You will be taking notes and then completing 3 questions before you leave. Split your paper into thirds. Number each third 1, 2, and 3. Make sure you have a pencil or pen.

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Newton’s First Law: Law of Inertia An object will move in a straight line in a constant speed OR remain at rest unless a force moves it. Gravity is a common force that moves things Inertia: the resistance to move Note: Objects will be balanced until a force makes them unbalanced.

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How does the Law of Inertia apply to this picture? An object in motion will stay in motion or stay at rest unless a force causes it to move. How is this picture like the law?

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Newton’s Second Law: F=ma F = force m= mass a = acceleration (m/s 2 ) The acceleration of an object depends on how much mass it has and how much force is applied to the object. If the object has a lot of mass, it will need a big force to move it.

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Math Formula F = ma Mass of the object will always be the same; kg Acceleration: m/s 2 Force: Newtons

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How does F=ma apply to this picture? Acceleration of an object depends on its mass and how much force is applied to the object. Why would scientists need to consider forces, mass, and acceleration when designing seatbelts? Your answer must discuss all 3 variables.

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Newton’s Third Law: Action Reaction For every action, there is an equal and opposite reaction Think of the chair lab with balanced forces: you do not fall through the floor because the floor pushes back up on you Common Examples: Fire from a rocket goes down as the rocket is pushed up A squid shoots water backwards and moves forwards Push back on the ground if you are on a skateboard, move forward

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How does Action Reaction apply to this picture? For every action, there is an equal and opposite reaction. Where is the equal and opposite reaction in this picture? Is there more than one example of action/reaction?

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On your own questions On your paper, divide the space into thirds and write #1, #2, and #3. This gives you space to answer all 3. #1: Newton’s First Law states _________________. This picture is like Newton’s first law because __________. #2: Newton’s Second Law states ____________. This picture is like Newton’s second law because _________. #3: Newton’s Third Law states _____________. This picture is like Newton’s Third law because _________.

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