Headmaster, et al,
Thanks chaps, it is all so simple, and major airlines like Qantas have had it wrong for years, and wind shear doesn't effect an aircraft, and inertia effects don't count.
Ever heard of a Reference (constant) Groundspeed approach. Probably not.
I wonder why we have bothered with all that training for so many years, particularly to cope with micro-bursts, which are "only" an extreme change in wind velocity, which, in your world, doesn't effect the IAS, and therefor is of no relevance to aircraft performance.
Fortunately, I live in the real world, and have to deal with the real atmosphere, when I am flying real aeroplanes.
Tootle pip!!
PS: Your (not very) smart schoolboy physics reminds me of my old physics teacher, who conclusive demonstrated, on the blackboard, how a man -made satellite was not possible, I disputed his "reasoning" and mathematics and got tossed out of the class. About three weeks later, the USSR orbited Sputnik.