What is Lift?
Lift is the force that directly opposes the weight of an airplane and holds the airplane in the air. Most of the lift on a normal airliner is generated by the wings. Because lift is a force, it is a vector quantity, having both a magnitude and a direction associated with it. Lift acts through the center of pressure of the object and is directed perpendicular to the flow direction. There are several factors which affect the magnitude of lift.