Barit1
The thrust produced by a propeller (or by wheels) is limited by the power delivered to it in the form of torque and rpm. It follows that if the instantaneous power delivered to a propeller (or wheels) remains constant, the thrust has to linearly decrease as the vehicle speeds up, as you said.
The thrust produced by a jet engine, however, is not limited in that way. Speed affects the net thrust output indeed, but in a different way. It can even increase it by compressibility effects.
The power delivered by a piston engine to a vehicle propulsive system is constant with speed. The power acquired by a jet engine vehicle is not. That is why we cannot relate them easily. We cannot compare them at brake release, because the jet engine has no speed ergo no power. You can compare a Ferrari with a Super Constellation, but not with a 747.
Using the simple formulas relating Energy, Work, Power, Force, Distance and Time we can calculate how much power has been required to carry out any given take off roll, as Pit Bull and I said. And let's also apply the propulsive efficiency and the figures will increase to the Koreans golfers amazement.
By the way. When skipping in the gym the machine shows the calories burnt during the excercise. Now, these calories are not taking into account the human body thermal efficiency, are they? I hope not, otherwise it means that, if I eat that one of those delicious 200 Kcal cookies that call me from the fridge I'll have to run 10 km to burn it! What is the human body "efficiency" more or less?