Pendular acceleration
Traced by <a href="//commons.wikimedia.org/wiki/User:Stannered" title="User:Stannered">User:Stannered</a>
2007-04-11
<a href="//commons.wikimedia.org/wiki/File:Pendular_acceleration.jpg" title="File:Pendular acceleration.jpg">File:Pendular acceleration.jpg</a>