| A | B |
|---|
| velocity | the speed and direction an object is moving |
| motion | a change in the position of an object |
| force | any push or pull |
| reference point | a place or object used to determine if an object is in motion |
| friction | a force that acts when two surfaces rub together |
| speed | the rate at which an object changes position |
| gravity | the force that pulls all objects toward each other |
| lift | a pushing force from below that keeps an airplane in the air |
| drag | friction cause by the air as an object moves through it |
| thrust | a force that pushes or pulls an airplane forward |
| buoyancy | the force on an object in the water making it rise or move upward |
