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Unit 3: Force
| Term | Definition |
|---|---|
| Force | a push or a pull. |
| Gravity | A force that pulls objects with mass towards each other. |
| Friction | The force that opposes the motion between two surfaces. |
| Magnetism | the force exerted by magnets when they attract or repel each other or iron. |
| Applied force | A force that is directly exerted on an object by another object or person. |
| Normal forces | The support force exerted on an object that touches another stable object. |
| Balanced forces | When forces are in opposite directions with the same amount of force. NO CHANGE IN MOTION OCCURS!!! |
| Unbalanced forces | When forces are in opposite directions and one force is stronger than the other. A CHANGE IN MOTION OCCURS IN THE DIRECTION OF THE LARGER FORCE! |
| Net force | The total amount of forces acting on an object. |
| Newton's third law | For every action there is an equal and opposite reaction. |
| Force pairs | A combination of two forces that are equal in magnitude and opposite in direction. |