12.4: Stress, Strain, and Elastic Modulus (Part 1)
https://phys.libretexts.org/Bookshelves/University_Physics/University_Physics_(OpenStax)/Book%3A_University_Physics_I_-_Mechanics_Sound_Oscillations_and_Waves_(OpenStax)/12%3A_Static_Equilibrium_and_Elasticity/12.04%3A_Stress_Strain_and_Elastic_Modulus_(Part_1)
WEBJun 14, 2023 · Tensile stress and strain occur when the forces are stretching an object, causing its elongation, and the length change ΔL Δ L is positive. Compressive stress and strain occur when the forces are contracting an object, causing its shortening, and the length change ΔL Δ L is negative.
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