Work-energy principle and principle of least action

The work-energy principle we study in M2 is closely related to the principle of least action used in more advanced physics.

Here are two explanations:

Richard Feynman

Cleon Teunissen

And David Tong’s lectures, which cover Lagrangians, Hamiltonians, and a proof of Noether’s First Theorem:

David Tong on Lagrangians and Hamiltonians in classical mechanics