| A | B |
|---|
| natural motion | movement without a force (gases rise, solids all, the moon orbits, etc.) |
| Aristotle | Observed that motion was natural or unnatural |
| force | a push or pull |
| inertia | the "want" of an object to stay as it is |
| Galileo | experimentally came up with the idea of inertia |
| speed | distance traveled over a certian time |
| velocity | speed with direction |
| vector | type of measurement with number and direction |
| scalar | type of measurement with number only |
| reference frame | what we compare motion to |
| Newton | came up with the law of inertia |
| 1st Law of Motion | An object in motion wants to stay in motion, an obejct at rest wants to stay at rest, until an outside force is applied |
| net force | all of the forces added together |
| Newton | metric unit used to measure force |
| tension | a force along a string |
| weight | gravity's pull on an object |
| equilibrium | when all upward forces equal all downward forces |
| equilibrium rule | E F=0N |
| support force | surface force |
| static equilibrium | an object at rest |
| dynamic equilibrium | an object moving at constant velocity |
| unnatural motion | movement needing force |
