Here's how it works:

* Aerodynamics: An airplane's wings are designed to create lift. They are shaped like an airfoil, which is curved on the top and flat on the bottom.

* Airflow: When an airplane moves through the air, the airflow over the top of the wing travels a longer distance than the airflow underneath.

* Pressure Difference: This longer distance causes the air pressure above the wing to be lower than the air pressure below the wing.

* Lift: This difference in pressure creates an upward force, called lift, which pushes the airplane upwards.

Other forces acting on an airplane:

* Thrust: The forward force generated by the engines.

* Drag: The force that resists the plane's motion through the air.

* Weight: The downward force due to gravity.