Calculating Tension in a Flying Pig's Rope: Centripetal Force Explained

[Centripetal X]

My mission:

Find the force of tension in the rope supporting your flying pig. No joke. We have a pig with mass .1618 kg that is attached to a string of "negligable mass". It flies around from a supsended point in uniform circular motion. Using the radius and period I found, I got the centripetal force to be .955 N. How do I relate this into the force of tension?

 

[Hootenanny]

Where do you suppose the centripetal force is coming from?