I had two students come to my office hours on Wednesday the week of February 15th. One student was struggling with centripetal force, particularly with the recitation exercise for the week and one of the homework problems. When relating tension and centripetal force, it seemed especially useful to break down the problem into X and Y components and solving the problems using two equations with two unknown variables. The other student came in with a few questions about that week's homework. She needed a little clarity conceptualizing work, and while working through the homework problems, I stressed that only the component of force in the same direction of displacement is actually accounted for in the actual equation. This seemed particularly useful in helping her solve the homework problems.
Last week, I had one student come in on Monday. She had a few questions regarding the PEC for that week, and she has come in a few times before with questions about prior PEC's. We walked through the problems, mainly about the conservation of mechanical energy, and it was useful to note to her the differences between conservative and nonconservative forces, and the complete conversion of potential to kinetic energy in the absence of nonconservative forces. Another student came in on Friday with questions about the homework dealing with applying the work-energy theorem.
Broccio
MWF 1:00-1:50
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