How to download from Utorrent?

I went into this page: http://www.torrentz.com/ , i looked for Mamma mia movie, and download the torrent. Then with utorrent i clicked on add torrent and wait for it to finish downloading. Afther that, it created a folder with a .rar folder inside. In the .rar is the movie, but i can extract it because it has a pword. I don't get it, where am i suppossed to get the pword from?