| A | B |
|---|
| Average Speed | A rate of motion determined by dividing the distance traveled by travel time |
| Constant Speed | A rate of motion that does not vary |
| Instantaneous Speed | The rate of motion at any given instant |
| Speed | The rate of motion, or the rate of change in position |
| Velocity | The rate of motion in a specific direction |
| distance | scalar quantity that describes how far an object has moved |
| displacement | the distance and direction of an object's change in position from the starting point |
| frame of reference | a system of objevts that are not moving with respect to one another |
| vector | a quantity that has a direction associated with it. |
| free fall | the movement of an object toward Earth because of gravity |
| constant acceleration | a steady change in velocity |
| position | the location of an object relative to an origin |
| time interval | final time minus initial time |
| motion diagram | Shows a series of images showing the position of a moving object over equal time intervals |
| particle model | a simplified motion diagram that shows the object in motion as a series of points |
| scalar | a quantity that has only magnitude |
| acceleration | the rate at which velocity changes over time |
| constant | a quantity whose value does not change |
| position-time graph | The slope represent the velocity |
| velocity-time graph | the slope represent the acceleration |
