Question

How do airplanes stay in the air?​

Answer 1

$\huge \ \ \ \: Αɳʂɯҽɾ$

There are four forces that act on the plane while it's in the air: thrust, drag, lift and gravity. The thrust is generated by the jet engines, and this helps the plane to propel forwards, whereas the lift force acts on the plane wings and allows it to move upwards, and also to maintain its altitude.

Answer 2

Technically, it is possible for an airplane to hover for a few moments, but only in the rarest of circumstances. If weight and lift cancel each other out at the same exact time that thrust and drag cancel each other out, the plane would hover until one of these variables changed.