Is it possible to design a spring that could, satisfy the kg to mm ratio according to the diagram shown in the folling website? A spring that would increase its kg or Newton in resistance the more it is compressed, as like the diagram shown? (Consider the diagram for the mangets strength and pretend it is a diagram for a spring instead)
http://www.supermagnete.de/eng/S-20-10-N
http://www.supermagnete.de/eng/S-20-10-N
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Yes, such a spring could be designed, but its curve would have to be the mirror image of the curve you've shown i.e.zero force at zero compression rising to 12.3 kg at 15 mm. compression