Kutta-Joukowski Theorem

The Kutta-Joukowski Theorem explains how lift is generated on a wing. It states that the lift force is proportional to the density of the air, the speed of the airflow over the wing, and the circulation—a measure of the rotation in the airflow around the wing. Essentially, as air moves faster around the wing and spins around it, a force is created perpendicular to the airflow, providing lift. This theorem helps explain the fundamental aerodynamic principle behind how aircraft stay in the air and is key to understanding wing design and flight.