How Airplanes Fly - How Airplanes Fly By Tooba Khan...

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How Airplanes Fly? By Tooba Khan
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http://www.youtube.com/watch?v=bv3m
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Airplanes fly when the movement of air across their  wings creates an upward force on the wings (and thus  the rest of the plane) that is greater than the force of  gravity pulling the plane toward the earth.
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Bernoulli’s Principal Bernoulli discovered that the pressure exerted by a moving  fluid is inversely proportional to the speed of the fluid. In other  words, fluid pressure decreases as fluid speed increases, and  vice versa.
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Application of Bernoulli’s Principal on Flight The same principle applies to moving air.  The faster that air moves through a space, the lower the air  pressure; the slower it moves, the higher the pressure.  Aircraft wings are designed to take advantage of that fact and  create the lift force necessary to overcome the weight of the  aircraft, and get airplanes off the ground.
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