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| can cause an object to start moving, stop moving, or change direction |
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| equal forces acting on one object in opposite directions/will not change an objects motion |
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| the tendency of an object to resist change in motion |
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| the force that one surface exerts on another when the two rub against each other |
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| when forces are exactly balanced |
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| when solid surfaces slide over each other |
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| when an object rolls over a surface |
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| the friction that occurs when an object moves through a fluid |
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| when the only force acting on an object is gravity |
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| objects falling through the air experience this type of fluid friction |
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| plants respond to the force of gravity; no matter how a young plant is positioned in the soil, its stem grows upward and its roots grow downward |
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| the measure of the force of gravity on an object |
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| the amount of matter in an object |
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| the force that pulls objects toward each other |
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| causes a fluid to move from one place to another by increasing the pressure in the fluid |
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