| 1. | The origin of kinetic friction at nanoscale can be explained by thermodynamics.
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| 2. | A simple case of dynamic equilibrium occurs in constant velocity motion across a surface with kinetic friction.
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| 3. | One type of friction acting on the skier is the kinetic friction between the skis and snow.
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| 4. | For most surface interfaces, the coefficient of kinetic friction is less than the coefficient of static friction.
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| 5. | Kinetic friction occurs when the two objects are undergoing relative motion and they are sliding against each other.
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| 6. | A constant kinetic friction coefficient controlling the movement of pyroclastic flows and avalanches was named Heim coefficient after Albert Heim.
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| 7. | The kinetic friction can be reduced by applying wax to the bottom of the skis which reduces the coefficient of friction.
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| 8. | Typically, the static friction coefficient ( a heuristic number ) between two surfaces is larger than the kinetic friction coefficient.
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| 9. | However, when kinetic friction is taken into consideration it is clear that there is no net force causing constant velocity motion.
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| 10. | In such a situation, a force is applied in the direction of motion while the kinetic friction force exactly opposes the applied force.
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