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Force
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A push or pull.
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Newton's First Law of Motion
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An object will remain at rest or in motion unless acted on by an unbalanced external force.
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Inertia
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An object's tendency to either remain at rest or in motion.
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Velocity
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Speed in a certain direction.
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Gravity
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The force pulling objects toward the center of Earth.
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Weight
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The force of gravity pulling down on an object
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Newton (N)
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The unit of force or weight in the metric system.
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Pound
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The unit of force or weight in the customary system.
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Acceleration
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The rate of change in the speed and direction of an object.
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Newton's second Law of Motion
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An object acted on by a force will accelerate in the direction of the force.
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Air Resistance
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The force exerted by air against an object moving through it and acts in the oposite direction of the object's motion. This is also known as "drag".
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Parabola
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The curved path (or arc) of a thrown object. Example - the path of a tossed baseball.
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Friction
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A force that opposes the forward motion of the moving car.
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Speed
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A measure of how far an object travels in a certain period of time.
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Distance
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How far or the length that an object travels.
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