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Friction 1.3
Force, Motion & Energy
| Question | Answer |
|---|---|
| What force opposes motion between two surfaces that are in contact? | friction |
| What two factors determine the amount of friction? | the amount force and roughness of surface |
| Friction between two moving surfaces | kinetic friction |
| Friction between two surfaces that does not cause movement | static friction |
| How can friction be reduced? | using ball bearings lubricating with oil sanding with paper |
| Is all friction harmful? | no |