| Term | Definition |
| 1st law | inertia law |
| 2nd law | mass, acceleration, and force - formula: f=ma (fishy simbol- acceleration) law |
| 3rd law | action reaction forces law |
| inertia | tendancy of an object to resist change in motion |
| weight | the gravitational force between you and Earth |
| force | a push or a pull |
| ballanced force | two or more equal forces whose effects cancel each other out and do not change the motion of an object |
| unballanced force | two or more unequal forces acting on an object, causing the object to accelerate |
| net force | combination of all forces acting on an object |
| terminal velocity | the constant speed a falling object reaches when air resistance balances the force of gravity. |
| gravity | atractive force between any two objects in the universe |
| weightlessness | no forces acting on one thing |
| friction | rubbing force that acts against the motion between two touching surfaces and always slows an object down |
| free fall | only one force is acting on the object= gravity |
| two factors of gravity | 1.mass of object 2. distance between them |
| two factors that create an orbit | 1. gravity 2. inertia two factors |
| new formulas | f=ma, w=m9.8 formula's |
| d/t = v | velocity formula |
| d/t = s | speed formula |
| a = vf-vi/t | acceleration formula |
| p=mv | momentum formula |
| w=m9.8 | weight fromula |