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Force and Motion
| Term | Definition |
|---|---|
| force | push or pull |
| balanced forces | forces acting in equal and opposite directions, creating no motion |
| unbalanced forces | one force is stronger than the other, creating motion |
| Gravity | a force pulling things toward Earth |
| Friction | slows things down, by rubbing |
| air resistance | friction in the air |
| momentum | strength of something when it is moving |
| Speed | Distance divided by time |
| Acceleration | move faster, gain speed |