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The Physics of Paragliding
Transcript of The Physics of Paragliding
Images from Shutterstock.com Meet Lift Lift is the force that directly opposes the weight of an object (i.e. an airplane) and keeps the plane in the air. Lift occurs when a moving flow of gas is turned by a solid object. The flow is turned in one direction and the flow is in the opposite. Lift is a mechanical force. From Newton's Third Law of Motion, a turning action of a flow will result in a reaction on the object. Newton's Third Law: By Miles Gordon and Andy Tsai Physics of Paragliding: Daniel Bernoulli-Bernoulli's Equation: Bernoulli relates the pressure in a gas to the local velocity, so as the velocity changes around the object, the pressure changes as well. The lift is the component of the aerodynamic force which is the product of the pressure variation and the area of the entire body perpendicular to the flow of gas. Newton vs. Bernoulli: They are both correct in their theory of lift, integrating both will determine the magnitude and direction of the aerodynamic force. Paragliding: Hang gliding was invented by Leonardo Da Vinci, but most early attempts at gliding were failures. After the development of the airplane, gliders fell out of popularity until the 1970s, when they became much more popular. The sport of paragliding was invented in 1978, in France. Lift applies to paragliding as it is one of the most important forces, the one that opposes gravity and keeps the paraglider aloft. Drag: Drag is the force generated by the deflection of air that acts against the direction of movement. It is the force that slows down a paraglider and forces it to land. Vectors: Picture from http://www.turfnsurf.ie/site_media/images/top_images/paragliding4_lg.jpg Gravity Lift Thrust Drag Energy: Kinetic energy increases as the paraglider speeds up. It decreases when it slows down. Thermal energy increases over time due to drag. Potential energy increases as the paraglider gains altitude, and decreases as it descends. Works Cited: Oberson, J. , “Aerodynamics and Flight Mechanics”. 27 Apr. 2013. PDF file."History of Hang Gliding and Paragliding."
The United States Hang Gliding andParagliding Association. United States Hang Gliding and Paragliding Association, Inc,n.d. Web. 17 Apr. 2013.
Benson, Tom. "What is Lift?." NASA. NASA, 10 Sept. 2010. Web. 17 Apr. 2013.
Benson, Tom. "Bernoulli and Newton ." NASA. NASA, 10 Sept. 2010. Web. 17 Apr. 2013.Hewitt, Paul G. Conceptual Physics. Upper Saddle River, NJ: Pearson Education Inc., 2009. Print.