Modelová Otázka ID 3233 - 
Jaké je znění a vzorec Hookova zákona?
Správná odpověď je: D
Hookův zákon popisuje pružnou (vratnou) deformaci tělesa tahovým působením síly. Jiné typy deformací, při nichž se těleso po ukončení silového působení nevrátí do původního tvaru, nejsou tedy tímto zákonem popisovány. Hookův zákon dále říká, že normálové napětí σ je přímo úměrné relativnímu prodloužení tělesa ε, tedy 
, kdy E je Youngův modul pružnosti v tahu.
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