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I just took my 2nd physics midterm today and I didn't do so great. I just don't get how to pass this class! Its so hard. I have tried everything from doing all the problems to reading the book a few times. I understand the concepts fairly well, I say this because I do the homework just fine. But when it comes to exams, I just totally have no idea what to do. I am currently taking electromagnetism and the math is very challenging.

I think one of my problem is basic math. I get confuse when as to use what and where. Things like V=0 at r=infinity, and what potential is at what point (reference points and coordinates?)

I'm sure I am not the only person that has this problem. When I take an exam, its hard for me to piece together what concepts to use. I understand SOME of the problem and a little bit of what to do but I cannot truly understand it. It bugs me because I do problems in the book just fine.

So I guess my main question is, are there any ways to practice these basic math concepts? Things like: What integrand to use, equations like WORK=-DELTA U (minus signs really mess me up because of vectors). Or any other tips you guys might have for me. Personal experience to how you guys got through physics would be great!