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   This article is about one of the fastest and prolonged roller coasters called the Valravn. The article discusses the design used to build the roller coaster and the energy that the coaster requires in order to move at its extreme speed. This rollercoaster utilizes the steel frame that was invented in 1959, which made taller and sturdier coasters. Being a carefully engineered coaster, it is “designed to take riders 20 stories up to a 66-meter peak from which they plummet at a 90-degree angle and feel weightless.”(Hackett,2015).  At the start of the ride, the cart travels uphill, to reach a point that gives the coaster a great amount of gravitational potential energy, enough to propel the cart through the entire ride, while it gains more and more kinetic energy. According to the article, “without friction and other resistance a roller coaster car could cruise along indefinitely, provided it never climbed as high as the initial hill. The car’s energy would perpetually be converted from potential to kinetic and back again as the car glided along the track, according to the law of conservation of energy.”    This article is necessary because engineers and physicists are learning and trying to design faster and safer roller coasters for everyone’s use. They are creating these roller coasters from the laws of physics and the conservation of energy that we apply in class. This article relates to what we are doing in our physics class because it has to do with altering the energy at which roller coaster cars move, in order to make new and faster steel coasters. In class we just finished talking about potential and kinetic energies and how when something moves up a hill and begins to slow down, the potential energy converted into kinetic energy. Hackett, J. (2015, October 14). Shriek Science: Simple Physics Powers Extreme Roller Coasters. Retrieved January 10, 2018, from https://www.scientificamerican.com/article/shriek-science-simple-physics-powers-extreme-roller-coasters/

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