angle of repose

The angle of repose, also referred to as angle of friction, is an engineering property of granular materials. The angle of repose is the maximum angle of a stable slope determined by friction, cohesion and the shapes of the particles. When bulk granular materials are poured onto a horizontal surface, a conical pile will form. The internal angle between the surface of the pile and the horizontal surface is known as the angle of repose and is related to the density, surface area, and coefficient of friction of the material. Material with a low angle of repose forms flatter piles than material with a high angle of repose. In other words, the angle of repose is the angle a pile forms with the ground.
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For the engineering term, see Angle of repose. Angle of Repose is a 1972 Pulitzer Prize winning novel by Wallace Stegner about a wheelchair-bound historian, Lyman Ward, who has lost connection with his son and living family and decides to write about his frontier-era grandparents. It won the Pulitzer Prize for Fiction in 1972. The novel is directly based on the letters of Mary Hallock Foote, later published as A Victorian Gentlewoman in the Far West. Stegner's use of substantial passages of Foote's actual letters as correspondence from his fictional character Susan Burling Ward caused controversy when it came to light.
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The maximum angle at which a pile of unconsolidated material can remain stable.

Eng: angle of repose
Urdu: نہر کے کِنارے یا پشتے کی ایسی ڈھلان کہ برسات میں اِس کی مٹی نیچے نہ پھسلنے پاۓ ۔