# Difference between revisions of "Virial theorem"

The virial theorem is a feature of systems with central forces.

$\overline{T}= - \frac{1}{2} \overline{\sum_i \frac{dU}{dr}\cdot r_i}$

where $\overline{T}$ is the kinetic energy. The overlines represent time averages. The right hand side is known as the virial of Clausius (Ref. 2).