| A | B |
| Newton's 2nd Law of Motion | Force = mass X acceleration |
| Friction | the force that opposes the sliding motion between two touching objects |
| Static friction | frictional force that prevents 2 surfaces from sliding past one another |
| Sliding friction | frictional force that opposes motion of 2 surfaces sliding past one another |
| Air resistance | force that opposes the motion of objects that move through the air |
| Gravity | attractive force between 2 objects that depends on the masses of the objects and the distance between them |
| Centripetal acceleration | acceleration of an object toward the center of a curved or circular path |
| Centripetal force | a net force that is directed toward the center of a curved or circular path |
| Newton's 3rd Law of Motion | for every action there is an equal and opposite reaction |
| Weight | gravitational force exerted on an object |
| Momentum | The property of a moving object that equal mass X velocity |