<br>Beam in static equilibrium: The sum of forces and moment is zero.
<ul><li>Moments clockwise <i>red</i></li>
<li>Moments counterclockwise <i>blue</i></li>
<li>Center of rotation <i>pink</i></li></ul>
<a href="//commons.wikimedia.org/wiki/User:Jahobr" title="User:Jahobr">Jahobr</a>
<span class="int-own-work" lang="en">Own work</span>