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10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt

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A description of how far it is from one point to another.

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Distance

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If gravity acts to pull an object down a hill, this acts to push it up.

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Friction

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The resistance to the change in motion by an object.

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Inertia

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A measure of the pulling force of gravity.

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Weight

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The SI unit for distance.

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Meter

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F = m x a This is:

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Newton’s Second Law of Motion

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Also known as The Law of Inertia

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Newton’s First Law of Motion

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kg. m/s/s

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A Newton (N)

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The rate of change in velocity

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acceleration

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Acceleration due to gravity on the surface of the Earth

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9.8 m/s/s or m/s 2

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What is the weight of an object with a mass of 1 kilogram?

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F = ? m = 1 kg a = 9.8 m/s/s F = m x a F = (1 kg)(9.8 m/s/s) F = 9.8 N

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Acceleration, deceleration and a change in direction all can be caused when the net force is greater than ___

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zero newtons (0 N)

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As a box is sliding down a ramp, a 10 newton force of gravity is pulling the box down while a 2 newton force of friction acts to stop the box. What is the net force accelerating the box down the ramp?

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10 N – 2 N = 8 N

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A tow truck pulls a 2000 kg with a net force of 4000 N. What is the acceleration of the car?

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a = F ÷ m m = 2000 kg F = 4000 N 4000 N ÷ 2000 kg a = 2 m/s/s or m/s 2

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Jumping on a trampoline is an example.

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Newton’s Third Law of Motion

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A pencil sitting on a desk (not moving) is an example.

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Newton’s 1st Law

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The SI unit of Force

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The Newton

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Determines how much inertia an object has

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The mass of the object.

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A person flies through the windshield of the car because she did not have their seatbelt on. This is an example of

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Newton’s First Law of Motion

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What is the SI unit of Mass?

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kilograms

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If you go to the moon, what happens to your mass

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It does not change.

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The amount of matter in an object

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Mass

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If you drop a penny, an elephant, and a puppy at the same time from the same height, which would hit the ground first (ignoring air resistance)?

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They would all hit at the same time.

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Two factors in determining the amount of gravity between two objects.

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The mass and the distance between the two objects

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This is what happens to your weight and mass when you go to the moon.

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Weight decreases, mass remains the same.

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