| A | B |
|---|
| Motion | a change of position in a certain time |
| Force | a push or pull |
| Average Speed | total distance divided by total time |
| Velocity | the speed and the direction of a moving object |
| Acceleration | a measure of the change in velocity during a period of time |
| Friction | a force that acts in the opposite direction of motion |
| Mass | the amount of matter in an object |
| 9.8 m/s/s | the acceleration due to gravity on Earth |
| Weight | the measure of the force of attraction between objects |
| Inertia | the tendency to either stay at rest or stay in motion |
| Newton's First Law of Motion | an object at rest will remain at rest and an object in motion will remain in motion at constant velocity unless acted upon by an outside force |
| Newton's Second Law of Motion | F=ma |
| Newton's Third Law of Motion | for every action force, there is an equal and opposite reaction force |
| Balanced Forces | the forces acting on an object cancel each other out resulting in no movement |
| Unbalanced Forces | one force acting on an object is greater than others which produces a change in motion |
