| A | B |
| position | an object's place or location |
| speed | a measure of dostance an object moves in a given amount of time |
| velocity | an object's speed in a particular direction |
| acceleration | a change in velocity |
| momentum | a measure of how hard it is to slow down or stop |
| inertia | resists change in motion |
| action force | a push or pull |
| reaction force | a push or pull back |
| orbit | a circular movement an object makes around another object |
| frame of reference | the way you observe an object from different angles |
| average speed | a total distance an object moves divided by the total amount of time |
| deceleration | slowing down |
| motion | a change in an object's position |
| force | a push or pull to slow down, stop, change distance, or make and object move |