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S8P3.a
| Term | Definition |
|---|---|
| force | a push or pull exerted an object in order to change the motion of the object; force has size and dirtection |
| motion | an object`s change in position relative to reference point |
| reference point | a stationary object that is used to describe an object`s motion |
| 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 changes over time; an object accelerates if its speed, direction, or both change |