I Tested the Limits of Friction and Found a Paradox

Summary by Krater

The presenter explores the physics of static friction by attempting to hold people up against a wall using only friction and an angled push, examining the Painlevé paradox and the Painlevé G-spot where friction equations become undefined.

From the video

Answers: How can you hold someone up against a wall using only friction?

• static friction
• friction coefficients
• Painlevé paradox
• normal force
• physics of friction
• dynamic jam and chatter

What it concludes

• Pushing a person against a wall at an angled push redirects force into friction, allowing a person to be held up with less force than their weight once the friction coefficient exceeds about 0.4.
• Friction equations can become undefined and lead to paradoxical behavior known as the Painlevé paradox, making friction unpredictable under certain conditions.