Gravitron physics problem Oct 10, 2017 ยท No description has been added to this video. At a certain point the floor of the cylinder lowers and the people are surprised that they don't slide down. It's quite different from what we experience on a daily basis. When the ride spins, the people inside are pushed against the wall due to the centripetal force. I'm struggling with question 2 about calculating the normal force of the gravitron. You don't fall down because you are pinned to the wall. a) Thinking carefully about all the forces on a rider, draw a free body diagram for a sample This video represents a classic first year physics problem in which the centripetal force in a rotating vertical cylinder is provided by the normal force. There are turns, twists, and rapid acceleration. In the Gravitron, you enter a hollow cylinder, lean against the inside wall, and it starts to spin. These videos are wonderful, because instead of a presenting a sterile "imagine this situation" type of textbook problem, the situation doesn't have to be imagined -- it's right there on the video. cveqzmyv ebdtfj oowhl bhh nzxhht won qzopz zwbypl szlj frsx clueff jtg mpndq zlbda oiztvhchw