Airplanes are streamlined in order to reduce drag (coefficient of friction). This allows for less resistance, less fuel consumption, and greater speed.
They are streamlined and have powerful engines.
They are bigger and more streamlined than they used to be.
so that it is streamlined and it can go faster
To reduce drag and therefore improve performance and efficiency.
Examples of the streamlined shapes in day to day life include airplanes, cars, boats, ships, cycling hats and swimming costumes.
Smooth, streamlined shapes reduce air resistance. Symmetric shapes ensure flight stability.
if they were square it would be like friction and the airplane wouldn't be able to move
Birds are streamlined because all species of birds that ever existed and were NOT streamlined were unable to outfly the streamlined predators, so they got caught and eaten, laid very few eggs, had very few hatchlings, and became extinct. Airplanes are streamlined because that design reduces aerodynamic drag, which directly subtracts from thrust. So a streamlined airplane uses much less fuel than a square airplane does to cover the same distance. Once this fact became generally known, nobody would buy any square airplanes, and the companies that built them went out of business. A lot like the birds.
airplanes need wings so they can glide and land correctly
to be able to get through water as easily as possible, the same way that planes and fast cars have to be streamlined.
i dont know i think its that it is big
Because there are no frictional forces.