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Old Feb 23rd 2012, 10:27 PM   #1
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Join Date: Feb 2011
Posts: 9
Speed of fly on a plane versus speed seen on ground.

Not sure if this belong in the forum but here goes..

My dad asked me this question
If there is a fly on the plane and the fly goes from one end of the plane to the other, how fast is it really flying? Is it flying faster than the plane?
I asked this before on a physics/math forum somewhere. The answers i got were that it would depend on who is looking at the fly.
If the person watching the fly is on the plane, the fly is not going faster than the plane. On the ground, the fly would seem like it is faster than the plane( if the plane is transparent)
I think that's the correct answer.
I told my dad this.. and he asked me what if half the fly is inside the plane... half of it is not....
I wonder what kind of questions he would ask if he actually had a college education in physics...
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