| A | B |
|---|
| Air Resistance | The frictional force air exerts on a moving object, opposite in direction to the object's motion |
| Centripetal Force | The force that causes an object to move toward the center of a curve |
| Law of Conservation of Momentum | A law stating that the total momentum of a group of objects does not change unless outside forces act on the objects |
| Momentum | A property of any moving object; equals the object's mass times its velocity |
| Newton's First Law of Motion | States that an object moving at a constant velocity keeps moving at that velocity unless a net force acts on it |
| Newton's Second Law of Motion | States that an object accelerates in the directino of the net force applied to it |
| Newton's Third Law of Motion | States that for every action, there is an equal and opposite reaction |
| Projectile | Any object shot or thrown through the air |
| Terminal Velocity | The greatest velocity reached by a falling object |
| Acceleration Due to Gravity | A constant with the value 9.81 m/s^2 (32 ft/s^2) |
| Weight | The measure of the force of gravity on an object, usually the force between Earth and an object at its surface |
| Mass | The amount of matter in an object |
