Here's how it works:
* Weight: This is the force of gravity pulling the airplane downwards.
* Lift: This is the upward force generated by the airplane's wings. The shape of the wing and its angle of attack (the angle at which the wing meets the air) cause air to flow faster over the top of the wing than the bottom. This difference in airspeed creates a difference in air pressure, resulting in an upward force called lift.
When lift is equal to or greater than the weight of the airplane, the plane can stay airborne.
