| A | B |
|---|
| motion | The state in which one object's distance from another is changing. |
| reference point | a place or object used for comparison to determine if an object is in motion. |
| International System of Units (SI) | A system of measurement based on multiples of ten and on established measures of mass, length, and time |
| meter | the basic SI unit of length |
| speed | the distance an object travels in one unit of time |
| velocity | speed in a given direction |
| acceleration | the rate at which velocity changes |
| formulat for acceleration | acceleration=final velocity-initial velocity/time |
| formula for speed | speed=distance/time |
| deceleration | negative acceleration |
| constant speed | straight line on a distant time graph |
| curved line-- distance vs time graph | Shows acceleration |
| straight line- time and speed graph | Shows acceleration |
