Zero lever spring system

substitution of Equation (3.161) gives at points of equilibrium 

Next we find an expression for the meehanical sensitivity. Differentiation of Equation (3.161) with respeet to g gives 

It is elear that by deereasing the angle 5 it is possible to perform astatization of the system and inerease the meehanical sensitivity. The same approach is applied in the general ease when we deal with a non-zero-length spring or a system of them, and Hooke s law has a eonventional form F — k(l — /q). 

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