When analyzing dance and the specific movements of dance, you realize that a lot of physics are actually involved in this activity. For instance, when looking at a dancer, you realize they maintain very good balance because its essential in being a good dancer. Having balance means that a dancer's center of gravity must remain directly above the area of contact with the floor because it will ensure positive vertical posture and balance that will keep you from tipping and falling over. Maintaining balance on flat foot is simple and easy, however it gets more difficult when there is less and less contact between your foot and the floor. For instance when dancing en pointe or up on your toes, balance becomes more difficult to reach. Also spinning in dance is affected by your rotation speed and resistance. When spinning with arms and legs freely open and swinging, your speed rotation decreases and resistance increases because your body is in a more open position. When spinning with arms and legs pulled in tight against the body, you'll notice that the speed of your rotation is much quicker and the resistance decreases because your body is in a closed position allowing you to turn more quickly and efficiently.