Add speed equation to docs

README.md

@@ -80,6 +80,13 @@ Create an addition function called `foo`. Note that to start a function you do i
 -> 3
 ```
 
+Here is the example of caluclating the speed dilation of an object at velocity `v` in m/s for time `t` in seconds.
+
+```
+> t 1 v 2 ^ C 2 ^ / - sqrt / s fn
+
+```
+
 ## Type Conversion
 
 ```