Bibliography

Bauer, Wolfgang, and Gary D. Westfall. University Physics with Modern Physics. New York: McGraw-Hill, 2011. Print.
http://en.wikipedia.org/wiki/Tightrope_walking
http://en.wikipedia.org/wiki/Slacklining
http://newsok.com/long-bar-helps-tightrope-walker-keep-balance/article/3505703
http://physicsofcircus.homestead.com/files/tightrope.htm