The Action Lab

Overview: A channel dedicated to demonstrating scientific concepts through bold and often unconventional experiments.

Key Experiments

Breaking the Angle of Repose: Self-Sorting and Stacking of Granular Materials

• Clip title: I Broke The Angle of Repose
• Author / channel: The Action Lab
• URL: https://www.youtube.com/watch?v=G6pTelud5-E

Summary This video explores the fascinating physics behind the “angle of repose,” the maximum slope a pile of granular material can naturally maintain, and delves into how this fundamental property can be manipulated to create unexpected behaviors like self-sorting and even vertical stacking. The presenter begins by illustrating that grains, such as sand or wheat, typically align themselves at an angle determined by their size and shape.

• WikiLink Angle of Repose
• WikiLink Granular Materials

Related Concepts

• Angle of repose: A fundamental property in physics and engineering that defines the maximum slope a pile of granular materials can maintain without collapsing under its own weight.
• Granular materials: Particulate matter such as sand, grain, or gravel that behaves collectively but does not form a single solid mass.

Backlinks

• 2026 04 12 Breaking the Angle of Repose Self Sorting and Stacking of Granular Mat

Source Notes

• 2026-04-12: I Broke The Angle of Repose