| A | B |
| motion | the state in which one object's distance from another is changing |
| reference point | A place or object used for comparision to determine if an object is in motion |
| meter | the basic unit of meaurement for length |
| speed | how fast an object moves from one place to another in a specific time. |
| velocity | speed in a given direction |
| acceleration | the rate at which velocity changes |
| constant speed | speed that does not change |
| average speed | the speed of a moving object is not always constant |
| deceleration | negative acceleration |
| unit of measurement for acceleration | m/sec/sec |
| formula for average speed | distance/time |
| formula for finding distance traveled | speed x time |
| formula for finding time | distance/speed |