Airplanes stay in the sky because of the principles of aerodynamics, especially lift. The wings of an airplane are shaped to make air move faster over the top and slower underneath. This difference in air pressure creates an upward force called lift, which helps the airplane rise and stay in the air.
In addition to lift, airplanes rely on engines for thrust, which moves them forward, and control surfaces like rudders and ailerons to steer. Pilots use these tools to navigate and keep the plane stable during flight. Together, these forces allow airplanes to travel long distances safely and efficiently. Shutdown123