| A | B |
|---|
| Acceleration | The rate of change in velocity (speed and/or direction) |
| Average Speed | A rate of motion determined by dividing the distance traveled by travel time |
| Balanced Forces | Forces that are equal in size and opposite in direction |
| Constant Speed | A rate of motion that does not vary |
| Force | A push or a pull exerted by one body on another |
| Friction | The force that resists motion between two surfaces that are touching each other |
| Gravity | The attracting force exerted by every object on every other object; dependent upon the masses of the objects and the distance between them |
| Inertia | The tendency of an object to resist any change in motion |
| Instantaneous Speed | The rate of motion at any given instant |
| Net Force | The resulting velocity of an object when multiple forces are applied to it |
| Speed | The rate of motion, or the rate of change in position |
| Velocity | The rate of motion in a specific direction |
| Weight | The measure of the force of gravity on an object, usually the force between Earth and an object at its surface |
