Question 1114986
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<pre>
The physics model


{{{V[tailwind]}}}        = {{{V[bike]}}} + {{{V[wind]}}}

{{{V[against_the_wind]}}} = {{{V[bike]}}} - {{{V[wind]}}}


<U>does not work</U>. It is not applicable to "bike-wind" problems.


Therefore, solving this problem on the base of this model is INCORRECT from the Physics point of view.


So, the solution by @Stanbone makes no sense.


Even posing this model in the framework of elementary Math/Physics makes no sense, 
since these branches has no adequate models to approach such problem.
</pre>


I just noticed it in this forum couple of times before in previous two years.