The quickest method I could think of, would be.. making a whip animation using sprites.
There's another possibility to use Physics to create a whip, by creating a series of revolute joints and apply force to the last one to create a realistic whipping motion.
I tried the Physics one, but failed. <img src="{SMILIES_PATH}/icon_mrgreen.gif" alt=":mrgreen:" title="Mr. Green">
Check out the example file below.
The example has two Layouts -- 'Whip' and 'Fail - Physics whip concept'.
The 'Whip' layout contains an animated sprite whip, and the 'Fail - Physics whip concept' layout contains the failed whip based on revolute joints.
Press [Space] to activate the sprite whip.
https://www.dropbox.com/s/a1wr1esrji53k ... .capx?dl=0