| A | B |
|---|
| Force | A push or pull exerted on an object. |
| Net Force | The overall force of an object when all the individual forces acting on it are added together. |
| Unbalanced Forces | A nonzero net force, which changes an object's motion. |
| Balanced Forces | Equal forces acting on a object in opposite directions. |
| Inertia | The tendency of an object to resist any change in its motion. |
| Newton | A unit of measure that equals the force required to accelerate one kilogram of mass at 1 m/s/s. |
| Friction | The force that one surface exerts on another when the two rub against each other. |
| Gravity | The force that pulls objects toward each other (9.8 m/s2) |
| Weight | The force of gravity acting on an object's mass |
| Momentum | The product of an object's mass and velocity. |
| Law of Conservation of Momentum | The rule that the total momentum of objects in an interaction does not change. |
| Centripetal Force | A force that causes an object to move in a circle. |
