is also reduced by placing slots in the wing so that the boundary layer or wall of air building up in front and around the wing can flow through it. One form of drag, however, known as induced drag, is a direct result of the lift produced by the wing. In effect, induced drag is the penalty exacted for lift. Great differences in the pressure of the air flowing over and under a wing can cause whirlpools or eddies of air to billow up along the trailing edges of the wings. These whirlpools produce a braking or force toward the rear that must be overcome by the forward thrust of the engines. As the angle of attack of an airplane is increased, the plane gains lift, but the lift is limited. As the angle is increased, air turbulence spreads over the wing. Then at a certain critical point (an angle of about 14 degrees in many airplanes), the wing loses lift and the plane stalls, nosing over into a dive.ConclusionAs a conclusion, I hope these previous paragraphs have given you the knowledge that everyone dealing with physics or airplanes should possess. These factors may not show all that physics has to contribute in the flight of an aircraft but they do show the major contributions. After reading these paragraphs, you should now have greater respect for physics, not just in airplanes, but in the world, because it is all around you and nothing can exist or work without it....
