Hi, At my school physics 2 has calculus 1 as a prerequisite. You don't have to take calculus 3 while taking physics 2 or prior to taking it. I found physics 2 to be extremely difficult. I was taking while taking calculus 2. We got into flux integrals, Gaussian surface integrals, and some other topics that covered vector fields and object moving in them. Oddly enough while teaching myself calculus 3 over winter break to make taking calculus 3 easier this semester I came across the EXACT topics in my calculus book. Surface integrals, Gaussian surface integrals, vector fields, line integrals etc. If I had taken calculus 3 before taking physics 2 I think I would of done much better. Did you taking vector/multivariable calculus 3 before taking physics 2 or no? I really wish I did because I probably would of gotten a better grade and could of actually understood what the heck I was learning. Flux integrals, Gaussian surface integrals, and some other topics towards the end of year really didn't make much sense to me at all. I was like what's that integral symbol with a circle on it, Why is area a vector, what's a partial derivative... now that I have learned calculus 3 I actually understand what these things are and don't understand why calculus 3 is not a prerequisite to physics 2.