# Stiffness

Written by Jerry Ratzlaff on . Posted in Classical Mechanics

Stiffness, abbreviated as k, is the resistance of the elastic deformation of an object that applies to both compression and tension.

## Stiffness Formula

 $$\large{ k = \frac{F}{\delta} }$$

### Where:

 Units English Metric $$\large{ k }$$ = stiffness $$\large{\frac{lbf}{in^2}}$$ $$\large{Pa}$$ $$\large{ F }$$ = applied force $$\large{ lbf}$$ $$\large{ N}$$ $$\large{ \delta }$$  (Greek symbol delta) = displacement $$\large{ lbf }$$ $$\large{N}$$