Uploaded August 2026 | Updated September 2026, 3 hours ago

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Research on Rope Friction is very limited, yet rope friction is surprisingly counterintuitive.

Every year I get emails from students looking for interesting rock climbing related topics to write their thesis... so here you go ;) And please let me know what you discover!

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Special Thank you to dr. Bart Weber

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Molecular probes reveal deviations from Amontons’ law in multi-asperity frictional contacts:
nature.com/articles/s41467-018-02981-y

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Derivation of the Capstan Equation:
youtube.com/watch?v=hsbNusf2N8Y

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00:00 Introduction
01:23 Quiz
02:54 Capstan Equation
05:22 Wrap Angle
06:34 Measuring the Ratio
13:39 Surface under heavy load
14:05 Inner Friction Setup
16:54 Macro Close ups
21:03 Little thank you
21:37 Inner Friction vs Surface Friction
24:26 Flat pull test
26:08 Interview with Dr. Bart Weber

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Because that makes a big difference and is the main reason that allows me do this project!
Deep Thanks!
Ben