Week 10/9

Office hours were busy this week, with about 15-20 students. They are having trouble differentiating work from force. Also, sign is messing them up consistently across all problems. The fact that energy problems deal with change in energy seems to be a confusing concept. Lastly, it seems to be difficult to the students that energy doesn't care about what happens in the middle of the problem (it only matters how it starts and how it ends). I believe conservative forces need to be explained, and I also believe advice on the negative side, i.e. stay consistent/use smart coordinate systems, needs to be given.