| A | B |
|---|
| Frame of reference | Things around you that you use to describe motion |
| Relative motion | Motion that is described based on a frame of reference |
| Newton | Metric unit of force |
| Weight | Measure of the force of gravity on an object |
| Friction | Force that keeps two objects that are touching from easily sliding past each other |
| Position | Describes a certain place |
| Motion | Any change in position |
| Speed | Measure of an object’s change of position during a unit of time |
| Force | Any push or pull |
| Acceleration | Change in the speed or direction of an object’s motion |
| Gravity | Force that pulls all objects toward each other |
