science 13
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11 terms
Terms | Definitions |
|---|---|
 motion | change in position relative to some fixed object or place |
| speed | distance traveled per unit of time |
| average speed | total distance traveled divided by the time it takes to travel that distance |
| velocity | speed and direction |
| acceleration | rate of change in velocity over time |
| momentum | a property of all moving objects |
| law of conservation of momentum | total momentum of any isolated system always remain the same |
| inertia | tendency of an object to stay at rest or in motion |
| newton | SI unit of force |
| action force | force acting in one direction |
| reaction force | force acting in the opposite direction |
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