This argument basically means the sum of all drag forces that can occur on a finite wing when directing the motion of a fluid medium in which the velocity is less than that of sound in the medium throughout the region considered acting on an aerodynamic wing with tips giving rise to trailing vortices or in other words on a finite wing Any physical body that is pushed through the air is associated with a resistance. In aerodynamics, drag is defined as the force that opposes forward motion through the atmosphere and is parallel to the direction of airflow velocity. Resistance must be eliminated from the push to achieve forward motion. Drag is generated by literally nine conditions associated with the movement of air particles on the plane. There are different types of drag: shape, pressure, skin friction, eddy, induced and wave. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an original essay Drag on an airfoil is mainly due to viscous effects at low speed and compressibility at high speed. Additionally, at high angles of attack, the flow can separate from the top surface and cause additional drag. So, as indicated in our dimensional analysis, the drag coefficient depends on three fundamental quantities, the Reynolds number, the Mach number, and the angle of attack. Typically the Reynolds number is important at low speeds, the Mach number at high speeds, and the angle of attack at all speeds. The total resistance is composed of the sum of various resistances that arise from different design characteristics. The main contributions to drag come from skin friction drag, induced drag, and profile drag. Skin friction drag is the literal friction between air flowing over the surface of the wing. Induced drag comes directly from lift, as lift increases so does drag. Airfoil drag comes directly from the geometry of the wing, and an airfoil would be expected to produce less drag than a cube. The drag of the profile develops from the frictional resistance of the blades passing through the air. It does not change with the angle of attack of the airfoil, but increases moderately as speed increases. Profile resistance is composed of shape resistance and skin friction. Form drag results from the turbulent wake caused by the separation of airflow from the surface of a structure. The amount of drag is related to both the size and shape of the structure protruding into the relative wind. Skin friction is also caused by surface roughness. Although the surface appears smooth, it may appear rough when viewed under a microscope. A thin layer of air adheres to the rough surface and creates small vortices that contribute to the drag. Skin friction resistance is caused by the actual contact of air particles against the surface of the aircraft. This is the same as friction between any two objects or substances, etc. Because skin friction drag is an interaction between the surface of the plane and the air, and the magnitude of skin friction drag depends on the properties of both the solid and the gas. from the above mentioned topic, helicopter blades could also be taken into consideration to explain this effect. Induced drag is generated by the circulation of airflow around the rotor blade as it creates lift and the high pressure area below the blade joins the low pressure area above.