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Motion and Forces
| Question | Answer |
|---|---|
| Reference Point | The location from which a change in position is measured. |
| Position | An object's location. |
| Motion | A change in position. |
| Inertia | An object's resistance to changes in its motion. |
| Speed | The distance an object travels over a period of time. |
| Velocity | Speed with direction. |
| Acceleration | A change in velocity. |
| Vector | A quantity that has both size and direction; is represented by an arrow. |
| Force | Any push or pull on an object. |
| Buoyancy | An upward force exerted on an object by liquids or gases. |
| Gravity | A force of attraction between all objects in the universe. |
| Weight | The force of gravity. |
| Friction | A force that opposes the motion of an object and produces heat. |
| Magnetic Force | The force of attraction or repulsion by a magnet. |
| Balanced Forces | Are equal forces that do not cause a change in motion. |
| Unbalanced Forces | Are unequal forces that always cause a change in motion. |
| Kinetic Energy | Energy in motion. |
| Potential Energy | Stored energy. |
| Newton | The unit for force. |
| Joule | The unit for work and energy. |