| A | B |
|---|
| Force | A push or a pull on an object |
| Gravity | The force that exists between all objects and tends to pull them together |
| Motion | How an object is moving |
| Mass | The quanity of matter in an object or substance |
| Weight | The force of gravity on an object or substance |
| Balanced Forces | When forces are equal and act in opposite directions |
| Unbalanced Forces | When a force does not have an equal force acting in the opposite direction on the same object |
| Speed | How quickly an object is moving |
| Acceleration | Speeding up, slowing down or changing direction |
| Normal Contact Force | The force that occurs between two objects in contact and is perpendicular to the surfaces |
| Distance | Length of path traveled |
| Balanced | Equal , but opposite forces |
| Unbalanced | Forces are not equal and opposite |
| Friction | A force between two surfaces in contact with one another that resists motion |
| Coefficient of Friction | The degree of interaction between two surfaces |
