The lift produced by the wings is greater than the weight.
Airplanes dont fly in the stratosphere because they produce too much sound. This may cause noise pollution and stress among people who are on the ground. So they dont fly in the Troposphere.
Yes. It is true that lighter airplanes fly farther. More weight means more down thrust is acting on the plane. This means traveling less distance. But less weight means less downthrust. So the airplane flies farther.
To answer this question ask yourself where do airplanes fly and where do spacecraft fly? You can see most airplanes which fly overhead, but spacecraft fly much higher. Airplanes fly within the earth's atmosphere, while spacecraft fly outside the earth's atmosphere in space. So when you decide to ask a sensible question, post it and you may receive a answer.
Smaller aircraft like fighters usually have a much more powerful engine and a better power to weight ratio, so they go faster.
One of the main reasons is to conserve fuel. Airplanes can fly at any altitude and speed. However, airplanes generally tend to fly at high altitude to conserve fuel. This makes the plane more efficient and keeps the operating cost down. Of course, an airplane can not always fly at max altitude at every flight. It may have too much weight or the distance it travels may be too short. So there is always a trade-off as to how they will fly the route.
Human beings. We have no wings, so we use airplanes to fly around.
Don't be so stupid..
Airplanes have motors because they need to fly somehow they can't just have pop-up wings and say, "Up Up and Away!!!!" so they could fly you retard so they could fly you retard so they could fly you retard
Air planes fly in the stratosphere. Sorry, i didnt give the info of why they fly..im so dumb
They are streamlined and have powerful engines.
They do, so the question is not relevant.
no i dont think so... i suppose they just fly over