What effect could the polar-front jet stream have on the speed of an airplane flying eastward? westward?

Question

2. Suppose there are two forces acting on the air at a given location. Suppose that the pressure gradient causes a force that is directed northwest toward a low. If another equally strong force is directed northeast, what is the direction of the net force on the air?

Answer 1

It depends what altitude you are at. Are you talking about being in the jet stream? If you are in the jet stream you would be a jumbo jet like a 747,777, a fighter jet etc. and it would hinder speed both ways because it would just cause alot of "bumps" or turbulence.