[NLSoldier]

I finally got hooded to admit defeat. The easist way for us to think about it was the rollerskate on treadmill example. If you are pulling yourself forward on the treadmill, you are going to go forward no matter what your [censored] wheels do. you are going to move forward! the hang up is that the OP suggests that the plane somehow is not able to accellerate forward but the fact is that it WILL accellerate forward. THe only thing stopping it is the wording of the problem which suggests its going to stay in place, but taht is not what is going to happen.

edit-actually, it doesnt even say anything about that in the OP. that must have been concluded by people later in the thread.