A conical pendulum in motion.  The pendulum bob moves in a horizontal circle with a constant speed <i>v</i>. θ=suspension angle, <i>r</i>=radius of bob's circular motion, <i>h</i>=vertical height of suspension above the plane of the bob's motion, <i>L</i>=length of the wire connecting the bob to the suspension point, <i>T</i>=wire's tension force acting on the bob, <i>mg</i>=weight vector of the bob.
<a href="//commons.wikimedia.org/wiki/User:CosineKitty" title="User:CosineKitty">CosineKitty</a>
<span class="int-own-work" lang="en">Own work</span>