<p>I am going to take physics II this semester. It was about two years ago when I took physics I and I am wondering if I should dedicate my whole winter break into re-familiarizing physics I again? Is physics II comprehensive or are physics I and II completely different concepts?</p>
<p>It certainly can’t hurt. Content-wise, it’s hard for me to imagine how much it would help (physics II is typically E&M/optics). But going over older physics concepts will get your mind back to thinking like a physicist, which is useful.</p>
<p>It’ll be pretty useful to become familiar with a few of the basic concepts from Physics I again that you might have forgotten. F=ma, the relationship between position, velocity, and acceleration, what is momentum, how do vectors work, etc. E&M is typically a bit harder than Newtonian mechanics, so it’s definitely worth reviewing all the stuff you’d be expected to understand thoroughly. Personally, I’d just spend a little time each day either reviewing old homeworks or reading through example problems.</p>
<p>Review your multivariable calculus as well, since it will be used in E&M.</p>