Physics of Spirals in trượt băng nghệ thuật

If you have not yet seen Physics of Jumps in Figure Skating and Physics of Spins in Figure Skating, please do so. There may be some information from there that you need for this video. http://www.youtube.com/watch?v=eCX8gbZBkws http://www.youtube.com/watch?v=jeB4aAVQMug Please answer these 4 questions: 1. Did you học anything from this video? 2. Was it interesting? 3. Was it understandable? What did you understand? 4. Did it have too many terms that you did not understand?