What force makes it difficult for an airplane to gain altitude fly upward?

Answer 1

These forces are called drag and gravity. Gravity is the downward force on the plane, keeping it from flying, but if the lift, the opposing force, is strong enough, you will achieve flight. Drag is the force pulling you back, making it harder to go forward. This force is produced by air pressure on the front of the plane. The opposing force in this case is thrust, which makes the plane move forward.

Answer 2

Gravity is not 'overcome'. All you have to do is produce a force acting upward

that's greater than the downward force of gravity, so that the combination of the

two (the 'net' force) is upward. An airplane does that by making air flow over the

wings, which generates 'lift'. You do it with the muscles in your legs, allowing you

to 'overcome gravity' and walk up stairs.

Answer 3

Gravity is the force that makes it difficult for an airplane to gain altitude and fly upward. As the airplane climbs, it must generate lift greater than the force of gravity to ascend. This requires increased engine thrust and lift from the wings.

Answer 4

The upward force on an aircraft that keeps it aloft is called 'lift'.