Angle of Repose

Angle of Repose

The Angle of Repose (pronounced: /ˈæŋɡəl əv rɪˈpoʊz/) is a term used in the field of Pharmacy and Physics to describe the maximum angle at which a pile of granular material can remain stable without any particles sliding down.

Etymology

The term 'Angle of Repose' is derived from the Latin words 'angulus' meaning 'angle', and 'reponere' meaning 'to place back'. It was first used in the context of granular materials in the 17th century.

Related Terms

• Cohesion: The action or property of like molecules sticking together, being mutually attractive.
• Friction: The resistance that one surface or object encounters when moving over another.
• Granular material: A conglomeration of discrete solid, macroscopic particles characterized by a loss of energy whenever the particles interact.
• Slope stability analysis: The potential of soil covered slopes to withstand and undergo movement.

See Also

• Talbot's law
• Soil mechanics
• Powder (substance)

References

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