| A | B |
|---|
| motion | when an object changes position over time when compared to a reference point |
| speed | the rate at which an object moves |
| velocity | the speed of an object in a particular direction |
| acceleration | the rate at which velocity changes |
| force | a push or a pull |
| newton (N) | SI unit of force |
| net force | the force that results from combining all the forces on an object |
| unbalanced force | when the net force on an object is not zero |
| balanced force | when the net force on an object is zero |
| friction | a force that opposes motion between two surfaces that are touching |
| gravity | a force of attraction between objects that is due to their masses. |
| weight | a measure of the gravitational force exerted on an object |
| mas | the amount of matter in an object |
