Linked from
The 13 pages that link to Shear strength, each with the reason it gives.
LandslideRelated: Failure occurs when stress along a potential slip surface exceeds this resistance.
Mass wastingRelated: It measures the resistance that must be overcome for slope failure.
Soil mechanicsRelated: It governs whether soil masses and foundations resist sliding or fail.
BrazingRelated: Brazed lap joints commonly transfer loads through shear across their bonded area.
MudflowRelated: A mudflow begins when gravitational stress overcomes the soil's shear strength.