Paper airplanes ~ how it is related to aerodynamics?~
We can almost say the same thing for explaining why paper airplanes are able to fly. I wrote "almost" because paper airplanes are little bit different from the actual airplanes. First, paper airplanes have the wings which is not same shape as real one. As you know already, the shape of real airplanes' wings are made to have larger surface area. However, paper airplanes' wings are made of paper and they're flat. Second, a paper airplane itself do not have something that can be thrust such as propellors or engines. The thrust is only given when a human pushes it. These are the differences between the actual airplane and paper airplanes.
A paper airplane does not fly flat. It usually flies facing upward little bit as shown in the picture. When it's flying like that, air tends to move faster on a upper side and slower on a lower side. Therefore, there would be lift force created. (Bernoulli's principle)
However, it reaches the ground eventually because there is no force of thrust after it's pushed by human and lift force is not able to overcome weight force which is gravity.
Now, I want you to experience what I talked by creating paper airplanes by yourself. I am going to introduce several paper airplanes relating to aerodynamics. You can make paper airplanes by yourself if you go there. However, before you start creating your own paper airplane I want you read through tips since it is going to be important later on.