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| an object´s change in position relative to a reference point. |
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| the distance traveled divided by the time interval during which the motion occurred. |
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| the speed of an object in a particular direction. |
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| the rate at which velocity changes over time; an object accelerates if its speed, direction or both change. |
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| a push or a pull exerted on an object in order to change the motion of the object; force has size & direction. |
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| the SI unit for force (symbol, N) |
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| the combination of all of the forces acting on an object. |
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| a force that opposses motion between two surfaces that are in contact. |
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| a force of attraction between objects that is due to their masses. |
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| a measure of the gravitatitional force exerted on an object; its value can change with the location of the object in the universe. |
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| a measure of the amount of matter in an object. |
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| the constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity. |
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| the motion of a body when only the force of gravity is acting on the body. |
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| the curved path that an object follows when thrown, launched, or otherwise projected near the surface of earth. |
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| the tendecy of an object to resist being moved or, if the object is moving, to resist a change in speed or direction until an outside force acts on the object. |
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