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The following was "split-off" from https://www.physicsforums.com/showthread.php?t=171079
uiulic said:Mr Hillman,
I have the following questions that have puzzled me and seek to get some release here.
1 stress vs strain (e.g. Hooker's elastic spring law f=ks, or in tensor expressions),
which is a more fundmental physical quantity ? (they are not fundmental in physics I know, but seem yes for deformable materials) Is this only a circular argument?
2 Is the first question similar to F=ma (the relation between F and a)?