Tag Archive for: brachistochrone

Explaining the General Brachistochrone Problem
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Consider a problem about the curve of fastest descent in the following generalized statement. Suppose that we have a Lagrangian system $$L(x,\dot x)=\frac{1}{2}g_{ij}(x)\dot…

Brachistochrone Subway Tunnel: Fastest Tunnel Shape Explained
Introduction
A subway tunnel could, in principle, operate without external energy (like electricity) if we assume zero friction everywhere. The train…
