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Rafael López
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&[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/25c400dd-4c27-46ec-ad41-a0b01f8a45f5
I think that the solution w[s] given by Mathematica is wrong. By the plot of w[s] (it seems a straight-line), I suppose that Mathematica solves the ODE for w[s] by taking ONLY the first value for y[s], namely, y[0]=1.207 and solves the ODE...