This was a tough class, but professor Davidson was a fair teacher imo. I took this class when the physics series was still the 6 series, so I am not sure how much the workload will differ between Physics 6a vs 5a. The workload was the same across all physics 6a courses (masteringphysics is what is was called?) and as long as you knew how to do those problems, you were pretty much set. Most of the questions I was able to find on Chegg, so I highly recommend getting a chegg account to help out with homework problems. Pretty boring professor, but made a nice joke from time to time. Nice guy tho. I went to Samani's lecture for physics 6a, and his class was A LOT harder than Davidson, and his exams were typically around 50%, from what I have heard (but he does curve). Davidson didn't curve, but at least his exam averages were fair. Would take again if possible.