To overcome lift-induced drag, what must be done?

To effectively overcome lift-induced drag, increasing the speed at which the airfoil travels is essential. Lift-induced drag occurs as a result of producing lift, particularly at lower speeds and higher angles of attack. The relationship between the lift generated and the drag experienced means that by increasing the airspeed, the wing can generate the required lift more efficiently.

When an airfoil moves faster through the air, the airflow over the wing becomes more streamlined, which helps to minimize the turbulence associated with drag. This is crucial in maintaining efficient flight, especially during critical phases like takeoff and landing, where lift-induced drag can significantly affect performance. Increasing speed allows the aircraft to maintain the necessary lift while reducing the drag that comes with generating that lift.

Other options involve actions that do not address the fundamental relationship between speed, lift, and drag in the same effective manner. For instance, reducing the angle of attack can help decrease drag, but this may also lead to a decrease in lift, which can compromise the ability to maintain flight. Therefore, the optimal solution for overcoming lift-induced drag in this context is through increasing speed.