Originally Posted by itsthewoo

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This is somewhat incorrect. Again, it is a function of your velocity squared relative to the air. If the air is moving (i.e. wind), then you must take that into account. A 20 mph headwind has you starting at 20 mph relative to the air while a 20 mph tailwind starts you at -20 mph. The negative airspeed will actually act as an assisting force up until you reach 0 mph, after which you will be back to 0 (relative to the air). However, it still helps at this point, since you are at a lower relative velocity.


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