| A | B |
|---|
| Speed | Distance traveled divided by the time it takes to travel the distance. |
| Motion | Change in position of an object compared to a reference point. |
| Reference point | A stationary object used to compare the position of an object. |
| Net force | Combination of all forces acting on an object. |
| Inertia | The tendency of an object to resist a change in motion. |
| Balanced forces | Forces that cancel each other out and do not cause a change in motion |
| Friction | The force that opposes motion between two objects that are touching. |
| Acceleration | The change in velocity divided by the time it takes to change. Occurs when something speeds up, slows down, or turns. |
