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Transcript of Rollercoasters
On a roller coaster, friction ( including air resistance and the wheels on the track) is due to the loss of mechanical energy. Friction is also felt by the riders at the end of the ride as the coaster is braked and slowed down. Velocity Velocity is the rate of change of position of something that follows a direction tangent of its path. We call the rate at which velocity changes 'acceleration'. On a roller coaster, after a hill that descends, then ascends on a smaller hill, the velocity changes, due to this, we feel centripetal acceleration. Acceleration Acceleration, as said previously, is the rate at which velocity changes. Changes in acceleration affect the thrill of a roller coaster immensely. At the bottom of a hill, the acceleration reaches its fastest, and at the bottom of a dip, riders feel compressed. Gravity Gravity is the force that attracts all matter to the center of the earth. It accelerates a roller coaster through loops and twists and is needed to detach a car from a lift hill to begin its descent down a hill. Acceleration Stress Acceleration stress is the result of high speed drops and abrupt surges in acceleration on a human body. It occurs during twists, turns and loops. Centripetal acceleration This type of acceleration is directed towards the center of a loop. Riders experience a pushing force and may feel compressed. This feeling is called 'centrifugal force' where the body's inertia tries to resist the car's change in direction, Luckily, the rider's are strapped inside, otherwise they'd continue in the straight path the coaster was following ... Types Of Acceleration Positive acceleration Riders feel heavy in their seats, usually when descending downwards suddenly Negative acceleration Riders feel momentary weightlessness in their seats Transverse acceleration Riders feel an increased pressure because their weight is being supported, this happens during sideways acceleration Skills Needed And Considerations There are many skills involved in creating and inventing roller coasters, a few are engineering, programming, psychology and programming. Complex tracks, such as boomerang need to be made out of steel because they need more support Are Roller coasters for everyone ? The reason as to why many people love roller coasters is solely down to the thrill they get from them. Roller coasters also release epinephrine, a stress hormone released during adrenaline rushes. However, many don't really fancy them because they are scared of falling or don't like heights. Some people can't go on roller coasters, such as people with heart problems, back problems and pregnant women. People with heart conditions can't ride because roller coasters increase heart rate, which is dangerous for people with heart conditions. Those with back problems may aggravate the problem because of the twists and turns. Pregnant women can't ride roller coasters because the acceleration would apply pressure to the baby and could harm it, and the fast stops and starts may lead to placental abruption Thank you Thank you for listening to the presentation