| A | B |
|---|
| position | an object's place or location |
| speed | a measure of the distance an object moves in a given amount of time |
| velocity | an object's sped in a particular direction |
| momentum | a measure of how hard it is to slow down or stop an object |
| inertia | the property of matter that keeps it moving in a straight line or keeps it at rest |
| action force | the force that you exert on an object at rest |
| reaction force | the force that pushes or pulls back |
| orbit | the path one body in space takes as it revolves around another body |
| law of universal gravitation | all objects in the universe are attracted to all other objects |
