https://bigmathnetwork.wordpress.com/2018/02/13/a-national-laboratory-internship-experience/

Cheers to Applied Mathematics !

Nalin Pithwa.

 

There is a nice discussion about this in Calculus and Analytic Geometry, G. B. Thomas.

Also, Prof. Steven Strogatz discusses the brachistochrone here:

https://martin56jones.wordpress.com/2017/11/18/the-brachistochrone-with-steven-strogatz-from-3blue1brown/

https://bigmathnetwork.wordpress.com/2017/10/30/mathematicians-are-needed-in-industry/