# Harmonic spring approximation

From SklogWiki

The **Harmonic spring** (also known as the **Hookean spring**) approximation assumes that the
spring obeys *Hookes Law*, i.e.

where *F* is the force, *x* is the extension of the spring, and *k* is the *spring constant*.

This approximation is often used for chemical-bond stretching terms in various force fields: