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9 terms
Terms | Definitions |
|---|---|
 motion | an object's change in position relative to a reference point |
| displacement | the change in position of an object |
| speed | the distance traveled divided by the time interval during which the motion occurred |
| velocity | the speed of an object in a particular direction |
| acceleration | the rate at which velocity changes over time; an object accelerates if its speed, direction, or both change |
| force | an action exerted on a body in order to change the body's state of rest or motion; force has magnitude and direction |
| friction | a force that opposes motion between two surfaces that are touching |
| static friction | the force that resists the initiation of sliding motion between two surfaces that are in contact and at rest |
| kinetic friction | the force that opposes the movement of two surfaces that are in contact and are sliding over each other |
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