| A | B |
|---|
| Force | A push or pull |
| Balanced Forces | equal and opposite forces. Sum of the forces is zero (net force zero). Object will not move. |
| Unbalanced Forces | Unequal forces. Sum of the forces (net force) is greater than zero. Object will move. |
| Gravity | A force of attraction between two objects based on their masses. It is a non-contact force. |
| Friction | A force that resists motion. Happens when one object rubs against another. It is a contact force. |
| Drag | Frictional force of air. This is a contact force. |
| Magnitude | Strength of a force |
| Vector | A quantity that has magnitude and direction. Shown as an arrow. |
| Newton | The unit of force |
| Net Force | The combination (sum) of all forces acting on an object |
| To find net force of opposite forces | subtract the forces |
| To find the net force of forces in the same direction | add the forces |
| Net force should have | a number, an arrow and a N unit |
| Contact Force | a push or pull on one object by another that is touching it (examples: friction, push, pull, drag) |
| Non-Contact Force | a force that one object can apply to another object without touching it (examples: gravity, magnetic force, electric force) |
