| A | B |
| Inertia | property of all matter "laziness" |
| newton's first law of motion | an object at rest stays at rest, an object in motion stays in motion |
| newton's second law of motion | the amount of force needed to move an object depends on its mass and acceleration |
| Newton's third law of motion | for every action there is an equal and opposite reaction |
| weight | the force of gravity on an object |
| mass | the amount of matter in an object |
| centripetal force | the force needed to keep an object moving in a circle |
| balanced forces | cause no change in motion |
| unbalanced forces | causes objects to move |
| net force | the total force that causes motion |
| friction | slows motion |