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Friction is independent of the contact area.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
8 sources for · 1 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that friction is independent of the contact area?

Yes. Multiple reference sources state the classical law that friction force is independent of the (apparent/nominal) contact area, and one source explains the atomic-scale reason. Some peer-reviewed work notes friction scales with real contact area, a narrower caveat.

Verdict: SUPPORTED · 8 sources for, 1 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 8
Friction
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Friction. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Friction

Evidence against · 1
Mechanisms of elastic contact and friction between rough surfaces
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Mechanisms of elastic contact and friction between rough surfaces. (n.d.). cir.nii.ac.jp. https://doi.org/10.1016/0043-1648(78)90135-7

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More for · 7
Contact area
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Contact area. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Contact_area

Why does friction does not depend upon area of contact?
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Why does friction does not depend upon area of contact?. (n.d.). physics.stackexchange.com. https://physics.stackexchange.com/questions/307902/why-does-friction-does-not-depend-upon-area-of-contact

An experimental study on the relation between friction force and real contact area
2021
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An experimental study on the relation between friction force and real contact area. (2021). doi.org. https://doi.org/10.1038/s41598-021-99909-2

Does Linearity Always Hold between Friction Force and Real Contact Area: An Experimental Study
2021
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Does Linearity Always Hold between Friction Force and Real Contact Area: An Experimental Study. (2021). doi.org. https://doi.org/10.20944/preprints202106.0210.v1

Young people's science encyclopedia : Volume 8/fl-gr
1991
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Young people's science encyclopedia : Volume 8/fl-gr. (1991). archive.org. https://archive.org/details/youngpeoplesscie0000unse_q9i9

Young people's science encyclopedia
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Ill.), N. C. o. E. (. (n.d.). Young people's science encyclopedia. archive.org. https://archive.org/details/youngpeoplesscie08nati

Practical mathematics
1913
Get citation
A, S. H. & H, T. W. (1913). Practical mathematics. archive.org. https://archive.org/details/practicalmathema00steruoft

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