| A | B |
|---|
| position | the location of an object compared with things around it |
| motion | a change in an object's position |
| speed | how fast an object's position changes |
| average speed | the total distance traveled divided by the amount of time |
| velocity | the speed and direction of a moving object |
| accleration | the change in velocity of a moving object with time |
| force | a push or pull exerted by one object on anthor |
| friction | a force that opposes the motion of an objectin contact with a surface |
| drag force | a force that opposes the motion of an object through a liquid or gas |
| gravity | a force of attraction that exists between all objects with mass |
| net force | the combined effect of all the forces acting on an object |
| balanced forces | forces that cancel each other out when acting together on a single object |
| unbalanced forces | forces that do not cancel each other out when acting together on a single object |
| inertia | the tendency of an object to oppose a change in motion |
| momentum | the mass of an object multiplied by its velocity |
