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Definition
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Term
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Definition
| the combination of all forces acting on an object |
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Definition
| the effects of two different forces cancel each other; the net force is zero; velocity is not changed |
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| the net force is not zero; the effects of the forces don't cancel; velocity of object changes |
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Term
| Newton's First Law of Motion |
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Definition
| if the net force acting on an object is zero, the object remains at rest; if the object is already moving, it will continue to move in a straight line with a constant speed |
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Definition
| the force that brings nearly everything to a stop; the force one object exerts on another when they rub against each other |
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| Newton's Second Law of Motion |
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Definition
| the acceleration of an object equals the net force divided by the mass and it's in the direction of the net force |
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Definition
| the size of the gravitational force exerted on an object |
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Definition
| the point in an object that moves as if all the object's mass were concentrated at that point |
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Term
| Newton's Third Law of Motion |
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Definition
| forces always act in equal but opposite pairs (for every action there is an equal but opposite reaction) |
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Definition
| the tendency of an object to resist change in its motion |
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Definition
| when static friction acts on an object at rest (surfaces tend to stick together; the box stops moving when you stop pushing) |
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Definition
| the type of friction that prevents an object from moving (box) |
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Definition
| occurs when an object rolls across a surface (bike tire and ground) |
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Definition
| amount of matter in an object |
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Term
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Definition
| an object will do this when the net force is not zero |
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