| A | B |
|---|
| acceleration | an object that is speeding up, slowing down, or changing directions |
| point of reference | background or point that is assumed to be stationary and is used for comparison when motion is described |
| motion | change in position in a certain amount of time |
| speed | rate at which an object moves |
| velocity | description of speed in a given direction |
| speed = | distance divided by time |
| acceleration = | final velocity-original velocity divided by time |
| distance | length of the path an object travels. |
| displacement | distance between starting and ending point |
| instantaneous speed | the speed of an object at an instant |
