Hooke's law - Wikipedia
https://en.wikipedia.org/wiki/Hooke%27s_law
OverviewFormal definitionAnalogous lawsUnits of measurementGeneral application to elastic materialsDerived formulaeLinear elasticity theory for continuous mediaNotesIn physics, Hooke's law is an empirical law which states that the force (F) needed to extend or compress a spring by some distance (x) scales linearly with respect to that distance—that is, Fs = kx, where k is a constant factor characteristic of the spring (i.e., its stiffness), and x is small compared to the total possible deformation of the spring. The law is named after 17th-century British physicist
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