What are classical, theoretical, Lagrangian, and Hamiltonian mechanics? Is it useful to know them as a mechanical engineer? - Quora

Answer (1 of 4): Classical mechanics usually refers to the mechanics of macroscopic objects i.e. anything that does not require a quantum description. It sometimes refers also to Newtonian mechanics which relies on forces to describe the systems it studies. Namely the central tennants are Newton'

96 questions with answers in THEORETICAL MECHANICS

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What are classical, theoretical, Lagrangian, and Hamiltonian mechanics? Is it useful to know them as a mechanical engineer? - Quora

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