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Motion and Forces
unit 1 lessons 1-4
| Term | Definition |
|---|---|
| Position | describes the location of an object |
| reference point | is a location to which you compare other locations |
| motion | is a change in position over time |
| speed | an object is a measure of how far something moves in a given amount of time |
| vector | is a quantity that has both size and direction |
| velocity | is speed in a specific direction |
| centripetal acceleration | the acceleration directed toward the center of a circular path |
| acceleration | the rate at which velocity changes |
| force | is simply a push or a pull |
| net force | the combination of all of the forces acting on an object |
| inertia | the tendency of all object to resist a change in motion |
| gravity | a force of attraction between objects due to their mass |
| free fall | when gravity is pulling it down and no other forces are acting on it |
| orbit | when it travels around another object in space |