roller coasters


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roller coasters

  1. 1. Roller Coasters<br />
  2. 2. 1912<br />marks the year John<br />Miller designed the first<br />Under friction roller coaster<br />
  3. 3. these colossal, twisted structures provide an<br />exhilarating and frenetic ride. They wed technology<br />to basic and seemingly incompatible emotions,<br />such as panic, courage, fear, joy, vertigo, and<br />amusement. Built as if to exclusively prove<br />Newton's theories, the science of roller coasters<br />abounds with all his terminology: acceleration,<br />mass, gravity, movement, and inertia. But in<br />all this, what is really thrilling is the free<br />fall, the attraction of the abyss.<br />
  4. 4. Safety Details<br />The designers of these extreme machines take into<br />account all possible safety factors to provide as safe<br />an experience as possible. Riders are made to wear safety<br />belts, and machine parts are inspected on a regular basis to<br />prevent accidents. Joints and beams are X-rayed for flaws.<br />Safety devices applied to the drive chain before cars reach<br />the top prevent the train of cars from moving backward.<br />These devices are also installed on some of the hills, where<br />the train slows down in its climb. In the event of wind gusts<br />and sudden decelerations, these preventive measures keep<br />the train in place and stop it from backtracking<br />
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  6. 6. Wheels to keep the trolley on the track<br />Three types of wheels are needed: upper wheels to control the<br />train for most of the route; lower ones for use on the hills—G<br />forces are sometimes greater than the weight of the train; and<br />lateral wheels to prevent the train from derailing on curves..<br />
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  8. 8. Force ofGravity in Action<br /> Most of the motion in a roller-coaster ride is a<br />response to the Earth's gravitational pull. No engines<br />are mounted on the cars. After the train reaches the<br />top of the first slope—the highest point on the ride—<br />the train rolls downhill and gains speed under the<br />Earth's gravitational pull. The speed is sufficient for it<br />to climb over the next hill. This process occurs over and<br />over again until all the train's energy has been lost to<br />friction and the train of cars slows to a stop. If no<br />energy were lost to friction, the train would be able to<br />keep running as long as no point on the track was<br />higher than the first peak.<br />
  9. 9. 1-POTENTIALENERGY<br />When the wagon <br />reaches the highest<br />point of the roller<br />coaster, it has a great deal<br />of potential energy.<br />
  10. 10. 2-MECHANICALENERGY<br />At a certain point in the<br />trajectory, both energies<br />(potential and kinetic)<br />cancel each other out<br />
  11. 11. 3-KINETIC ENERGY<br />is energy of motion that is, the energy<br />released by the train<br />every time it descends.<br />
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  13. 13. Acceleration<br />