| A | B |
|---|
| force | a push or pull |
| gravity | force or attraction between any two objects |
| newton | the unit for weight in the metric system |
| weight | force that gravity exerts on a mass |
| acceleration | the rate of change in velocity |
| displacement | measure of the distance and direction that an object moves |
| relative motion | change in position of one object compared to the position of another object |
| speed | rate at which the positon of an object changes |
| velocity | value giving the speed and direction in which an object is moving |
| vibration | rapid back-and-forth motion |
