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Motion and Forces
Unit 1, Lesson 1-4
| Term | Definition |
|---|---|
| position | the location of an object |
| reference point | a location to which another location is compared |
| motion | an object change in position relative to a reference point |
| speed | the distance traveled divided by the time interval during which the motion occurred |
| vector | a quantity that has both size and direction |
| velocity | the speed of an object in a particular direction |
| acceleration | the rate at which velocity changes over time |
| centripetal acceleration | the acceleration directed toward the center of a circular path |
| force | a push or a pull exert on an object in order to change the motion of the object |
| net force | the combination of all of the forces aacting on an object |
| inertia | the tendency of an |
| gravity | a force of attraction between objects that is due to their masses |
| free fall | the motion of a body when only the force of gravity is acting on the body |
| orbit | the path that a a body follows as it travels around body in space |