u/Apprehensive-Pea8468

For context I’ll be taking AP calc AB next year along with it as an upcoming 10th grader, and this year I think I did well/fine in AP physics 1. Is there anything I need to know for this course? Is it easier or harder than AP physics 1? What should I expect to know and learn?

For part B of FRQ2 version J, it asks for a derivation for the Ke of disk S using Mnaught and Vnaught. If I put my answer as 3/8mv^2 instead of 3/8mnaughtvnaught^2, would they take off points?