| A | B |
| acceleration | rate of change of velocity |
| average speed | total distance that an object travels divided by the total time it takes |
| balanced forces | forces on an object that are equal in size and opposite in direction |
| displacement | distance and direction of an object's change in position from the starting point |
| distance | how far an object moves |
| force | push or pull that one body exerts on another |
| inertia | resistance of an object to a change in its motion |
| instantaneous speed | speed of an object at a given point in time |
| net force | sum of the forces that are acting on an object |
| speed | distance an object travels per unit of time |
| velocity | describes the speed and direction of a moving object |