I have what I think is a physics question. I'm not quite sure how to phrase it, so I'll try my best.

My son, and his friends were having a "debate". What would happen if a fly, or any other type of flying insect is flying around inside an airplane? Obviously the fly can't travel as fast as an airplane. So how is the insect able to move in relation to the plane instead of being pinned to to rear of the cabin.

I felt a bit stupid that I couldn't come up with an explanation for the two kids. I even did a Google search, and nothing useful came from it. I would think the insect would fly in relation to the plane, but how?


Lets say somehow I am able to jump 10 feet into the air, and stay up their for 12 hours. The ground wouldn't look like its moving because I would still be in earth's gravitational pull. Why wouldn't that same principle apply to the "fly in an airplane problem"?

I have a feeling the answer is an obvious one, but I just can't figure it out.

Help me out fellow Gawkerites!