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S8P3.a
| Term | Definition |
|---|---|
| Force | a push or pull exerted on an object in order to change the motion of the object; force has size and direction. |
| Motion | an objects change in position relative to a reference. |
| Reference Point | a stationary object that is used to describe an objects 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 velocity changes over time; an object accelerates if its speed, direction, or both change. |