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Motion and forces
| Term | Definition |
|---|---|
| Position | describes the location of an object |
| Reference 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 given amount of time |
| Vector | A quantity that has both size and direction |
| Velocity | Speed in a specific direction |
| Acceleration | the rate at which velocity changes |
| Centripetal acceleration | acceleration in circular motion |
| Force | simply a push or a pull |
| Net force | combination of all the forces acting on an object |
| Inertia | the tendency of all objects 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 |