| A | B |
|---|
| position | location of an object |
| reference point | location to which another location is compared |
| motion | object's change in position relative to a reference point |
| speed | distance traveled divided by the time interval during which the motion occurred S=d/t |
| vector | quantity that has both size and direction |
| velocity | speed of an object in a particular direction (ex. traveling north at 40mph) |
| acceleration | rate at which velocity changes over time; an object accelerates if its speech, direction or both change |
| centripetal acceleration | acceleration directed toward the center of a circular path - objects constantly turning show centripetal acceleration |
