Question

In the clutch system the amount of friction between the two surfaces depends on

Answer 1

Answer:

1. - you have NEVER only two materials in contact but a third which is provided by environment for instance moisture or dirt or aggressive vapors
2. - the nature of the 2 surfaces and the specific load since an indentation can occur if the fifference in hardness is big
3. - "lubricant" viscosity was mentionned but temperature can lead in case of lower viscosity and log time under load to the expulsion of the lubricant and a change in the tribological conditions.
4. Friction coefficient is a simplified vew of a very complex phenomenon

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