Mimi+Carrero

Human On Water



**Gravity**- A girl inside of a ball filled with air, floating on top of the water. Even though the human inside the ball should be inside of the water, she's floating because of all the air in the ball. Gravity is pushing down on the ball which keeps it from floating away. The air inside the sphere keeps it from going in the water. Even if the girl inside decided to jump up and down as hard as she could, the ball will still stay above the water. The air and gravity are both at equal amounts which makes this possible. **Momentum**- The ball has little momentum on water if the girl is not pushing the ball. The only other thing that can make the ball move is the wind, or the waves from the water. If the girl wanted to stop the ball from moving, she would have to push the opposite way that the sphere is moving. If she wanted the ball to move all she has to do is walk inside the ball while pushing it at the same time. **Balance**- The gravity which is pushing down on the ball, is equal to the air pushing up on the ball. We all know that anything filled with air, such as balls, balloons, etc., float on water. Since both forces are equal, the ball is staying right where its at. I will not go under water or float in the air like a balloon. I think this is a very fascinating picture because its almost like you're walking on water. categories

Momentum, Gravity, and Balance references Works Cited // Dreamstime //. N.p., n.d. Web. 14 Mar. 2013. . // The Physics Classroom //. National Science Foundation, n.d. Web. 12 Mar. 2013. . // Starry Skies //. Kathy A. Miles, 9 Mar. 2012http://starryskies.com/try_this/momentum.html. Web. 12 Mar. 2013. .