<p>Hey CC'rs,</p>
<p>I'm just confused: In the Princeton Review book, there are topics about Center of Mass and Rotational Dynamics. But on the collegeboard website it does not outline these topics. Do I need to know these topics. THankyou</p>
<p>I’m using Kaplan and Barron’s prep books for the Physics subject test, and they did not cover these topics, so I don’t think so.
But just in case, go over these topics so you know them, but don’t study them extensively.</p>