| A | B |
|---|
| Force | a push or pull on body exerts on another |
| Interia | tendency of an object to resist change |
| Gravity | force exerted by every object in the universe on every other object |
| Newton's 1st Law of Gravity | An object moving at a constant velocity keeps moving at that velocity unless a net force acts on it |
| Newton's 2nd Law of Gravity | an object accelerates in the direction of the net force |
| Friction | force that opposes motion |
| Weight | the measure of the force of gravity on an object |
| Mass | a measurement of the amount of matter in an object |
| Balanced Forces | forces on an object that are equal in size and opposite in direction |
| Acceleration | the rate of change in velocity |
| Seat Belt Law | Another name of Newton's 1st Law of Motion |
| Net Force | changes the object's speed or direction or both |
| Terminal Velocity | the greatest velocity reached by a falling object |
| Air Resistance | frictional force air exets on a moving object; act opposite in direction to the object's motion |
