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