Reflection on a Day of Struggle
Teaching circular motion is just awful. That is, it is awful if you haven’t built a foundation of kinematics rooted in vectors quantities. How can you possibly interpret a centripetal acceleration of 4 m/s/s? What does that 4 mean?
Today is the first day all semester I’ve had to say to my students, “This makes no sense and right now we have no tools for making sense of it.”