# Studying Best place to learn langrangians?

#### quickquestion

Basically, it's been 5 years since I went to college and I never took Calculus 2. I dropped out of Calculus 1 because the teacher was a foreign old man and he spoke broken english, most of the lectures I couldn't really understand what he was saying and he had a really aggressive attitude with no bedside manner so I always felt on edge and could never really focus or connect with him on any of his lectures. Basically, I don't want be overly harsh on the dude, but the dude had a 1.5/5 rating on ratemyprofessor.

But I have been looking at this topic and it looks like something I could understand, just don't understand yet, if it was taught to me in a proper manner and not just thrown at me wikipedia style.

Basically, the colleges around me suck and I also don't have much money, so I'm wondering what online courses or youtube series would be best for me to learn the stuff in order to learn lagrangians, then once I learn that (such as derivative equations and such) then what would be the best place to learn lagrangians.

My second question is, is learning langrangians a waste of time, because the reason I want to learn the lagrangians is that there are some problems with the Newtonian model in-terms of game friction simulations. Basically, in real life, a tirewheel functions like a gear on a toothed rail, and Newtonian physics does not treat it like a gear on rail system, instead it treats it like a thrust force which it is not. So I am wondering if langrangians will help because wikipedia describes it as a replacement for the Newtonian model, and also mentions how it handles friction differently.

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#### QuantumQuest

Gold Member
I would recommend to watch the video lectures on Classical Mechanics given by Leonard Susskind, available on youtube. This link is for the first lecture and then you can follow the trail for the rest on youtube. A word of warning though is that you have to know / learn differentiation and integration regarding Calculus. So, if you aren't already there in Calculus, you have first to learn it in order to proceed smoothly with Lagrangians and other more advanced things in Classical Mechanics.

#### MidgetDwarf

Maybe after a course in Calculus 2/Linear Algebra (introductory), and Differential Equations. It makes more sense if you have these math topics under your belt.

#### quickquestion

Ok, thanks for the advice. I have a ton of videos to watch for my other career and they are building up but if I watch a couple of videos a week I should be able to get there.

"Best place to learn langrangians?"

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