week 10/23

This week's content concerned collisions. Because some collisions "break" the conservation of energy "rule" they just learned, I can see this being confusing. Additionally, based off the students that came to office hours, they are struggling to know what a system is. I believe center of mass discussions will help clear this up. The professor we work for compared and contrasted energy and momentum, which was a good move, because I saw many people equating those when grading homework. In two weeks, they have an exam, so I expect many people in office hours soon.