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| "An object that is at rest will remain at rest, and an object that is moving will continue to move in a straight line with constant speed, if and only if the net force acting on the object is zero." |
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| two forces that are in opposite directions, have equal magnitudes, and act on different objects. |
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| a force exerted by any segment of a rope or string on an adjoining segment. |
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| the vector sum of two or more forces acting on an object. |
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| if the net force on an object is zero |
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F=ma
"The acceleration of an object is directly proportional to the net force on it and inversely proportional to its mass." |
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| The supporting force acting upon the object. |
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| A force that acts on an object by touching it |
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| "The two forces in an interaction pair act on different objects and are equal in magnitude and opposite in direction." |
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| A perpendicular contact force exerted by a surface on another object |
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| The tendency of an object to resist changes in its motion |
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| a dot represents an object and arrows represent each force acting on it, with their tails on the dot and their points indicating the direction of the force. |
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| The constant velocity that a falling object reaches when the drag force equals the gravitational force |
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| when an object's apparent weight is zero, the object is in a state of ____. |
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| The vector quantity that relates an object's mass to the gravitational force it experiences at a given location. |
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| the gravitational force experienced by an object. |
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