When the different forces of lift overcome the force of gravity.
This is a bit of a silly question. Rockets create thrust which a force which keeps up. They are not dependant on air to stay u
Jets stay up in the air because they feel like it!!! hohohohoh
yh if it has enough petrol
Gravity.
No, a plane is a form of transportation that can fly in the air, while "plain hygregan" does not have a standard definition. It is likely a made-up or misspelled term.
The top is rounded in a way and the bottom is flat. This makes lift. That is how a plane stays up in the air.
It stays up in the air because its in space-where there's no gravity whatsoever. so, it stays up as there is no gravity to pull it down.
That depends on the height of the release, the air currents, and the skill of the pilot in exploiting them.
The rotors provide lift to keep them up.
Air can escape from the ballons even if there aren't holes in them.
A hot air balloon stays up because hot air is less dense than cold air. When the air inside the balloon is heated by the burner, it becomes lighter and causes the balloon to float upwards. By controlling the temperature inside the balloon, the pilot can control the altitude.
balloon stay up because of the air inside it. to make the balloon stay up the air should be light. inside the balloons you can find the air we called helium. helium is a light air that makes the balloon stay up. that's why if you blow the balloon it wont float because the air that comes from your mouth is not helium but carbon dioxide and carbon dioxide is heavier compared to helium so it wont float.