| Term | Definition |
| unbalanced force | forces on an object which are uneven in size |
| force | a push or pull, one body exerts on another |
| gravity | every object int eh universe excerpts a force on every other object |
| weight | the measure of force of gravity on an object |
| rate | any change over time |
| average acceleration | change in velocity/time |
| declaration | the negative change in velocity |
| acceleration | the rate of change in velocity |
| velocity | distance and speed of any moving object |
| average speed | the total distance traveled divided by the total time of travel |
| calculate speed | average speed traveled |
| constant speed | a speed tat does not change |
| speed formula | v=d/t |
| time formula | t=d/t |
| distance | d=v [x] t |
| motion | change in position |
| balanced force | forces on an object which are equal in size and opposite in direction |
| inertia | the objects tendency to resist any change in its motion |
| net force | the sum of all forces which result in a change in the objects speed direction or both |
| friction | the force that opposes the motion between 2 surfaces that are touching each oter |
| instantaneous speed | rate of motion at any given instant |
| speed | the rate of change in motion |