| A | B |
|---|
| position | An object's place,location |
| speed | A measure of a distance an object moves in a given amount of time |
| velocity | An object's speed in a particular direction |
| acceleration | A change in motion caused by unbalanced forces or a change in velocity |
| momentum | A measure of how hard it is to slow 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 first force in the third law in motion |
| reaction force | The force that pushes or pulls back in the third law of motion |
| orbit | The path one body in space takes as it revolves around another body;such as that of Earth as it revolves around the sun |
| law of universal gravitation | Law that states that all objects in the universe are attracted to all other objects |
