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Stiffness is the extent to which an object resists deformation in response to an applied force.[1]
The complementary concept is flexibility or pliability: the more flexible an object is, the less stiff it is.[2]
- ^ Baumgart F. (2000). "Stiffness--an unknown world of mechanical science?". Injury. 31. Elsevier: 14–84. doi:10.1016/S0020-1383(00)80040-6.
"Stiffness" = "Stress" divided by "strain"
- ^ Martin Wenham (2001), "Stiffness and flexibility", 200 science investigations for young students, SAGE Publications, p. 126, ISBN 978-0-7619-6349-3