## stressForce per unit area. If σ is the stress, F the force, and
A the cross-sectional area, then σ = F/A.
Tensile stress and compressive stress
are axial forces applied to a body that tend either to extend it or compress
it linearly. Shearing stress is a tangential force per
unit area that tends to shear a body. See also Hooke's
law. In a fluid, no shearing stress is possible because the fluid slips sideways, so all fluid stresses are pressures (positive or negative). ## Related entry• elasticity## Related category• CLASSICAL MECHANICS | |||||

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