http://discovermagazine.com/2008/the-body/11-the-physicist-who-figured-out-ballet
I found a site with information on how ballet is related to physics. Ballet involves physics and this site had a lot of information. It explained which moves had physics and how to apply it. It was written by Kevin Laws who is a actual ballet teacher now and who wrote three books. He explained that ballet is much more then practice and really strong toes.
This site helped me because there were multiple examples on how ballet involved physics. Most sites just list one example but this site had multiple. I can also apply this while I’m doing ballet, and I can understand it better if I had my own experience. But overall this was a very helpful site.