| A | B |
| Force | a push or pull that causes an object to move, stop, or change direction |
| Motion | a change in position of an object |
| Inertia | the tendency for an object in motion to stay in motion or an object at rest to stay at rest |
| Friction | a force that opposes motion when two when two surfaces are touching |
| Drag | a force that opposes motion that can be found in air or water |
| Gravity | a force that pulls objects toward the center of the earth |