Diagram of a particle at radius vector r with velocity V showing the radial and tangential components of the velocity, the angle of the radius vector with respect to the x axis and the angle of the velocity vector with respect to the radius vector.
<a href="//commons.wikimedia.org/wiki/User:Krishnavedala" title="User:Krishnavedala">Krishnavedala</a>
2012-01-21
<span class="int-own-work" lang="en">Own work</span>