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Which of the following elements does not influence frictional force between two surfaces?
23. Which of the following elements does not influence frictional force between two surfaces?
- Temperature
- Normal force
- Surface roughness
- Relative velocity
Answer
The correct answer is: D) Relative velocity
Explanation
Surface roughness, normal force, and temperature have each an important effect on the frictional force. However, the relative velocity between the surfaces does not directly affect the magnitude of frictional force.