GA Physical Science Textbook 8th Grade Chapter 5 Vocabulary Words
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| an object's change in position relative to a reference point | motion
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| an object/point used to identify the motion of another object | reference point
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| the distance traveled divided by the time interval during which the motion occurred | speed
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| the speed of an object in a particular direction | velocity
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| the rate at which velocity changes over time; an object accelerates if its speed, direction, or both change | acceleration
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| acceleration in a circular motion | centripetal acceleration
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| a push or pull on an object that can affect/change its speed/direction | force
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| SI unit for measuring force | Newton (N)
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| combination of all forces on an object | net force
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| forces which do not result in motion of an object | balanced forces
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| forces which affect an object | unbalanced forces
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| the force caused by two surfaces in contact; this force opposes motion | friction
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| friction with two object sliding against each other | sliding kinetic friction
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| friction with wheels | rolling kinetic friction
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| friction with moving objects | kinetic friction
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| friction that involves an object not moving even when force is applied to it | static friction
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| the force that attracts an object to another more massive object | gravity
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| a substance wich opposes friction | lubricant
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| the law made by Isaac Newton that states the concepts of gravity | law of universal gravitation
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| measure of gravitational force on an object | weight
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| amount of matter in an object | mass
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| What peanuts really are | aliens from planet Jupiter
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