Recent Tutoring Session Reviews
"[COVERED]: We covered Momentum and collisions, discussing how multiple-particle systems could be viewed as a single system whose center of mass moved at a constant velocity in the absence of external forces. We covered a complex problem involving changing masses, where the student got hung up, but after restating the relationships between Newton's 2nd Law and the sum of the individual momenta of the particles in the system a few times, as well as showing him how to draw and set up the problem, dividing it into different phases, he finally got the gist and was able to confidently handle the remainder of the problems. We discussed Impulse, defining it as the change in momentum, and showing how we could use it to discuss the average forces exerted between particles during a collision. He got a little tripped up by the signs in these problems, but I showed him that being careful about defining his axes and checking the signs early on, or re-checking his algebra if the answers were illogical could save him. We discussed how unifying the conservation of momentum and kinetic energy could be simplified in one-dimensional elastic collisions. I left as an exercise for him an example of a collision in two dimensions, prefacing it by saying that the key was remembering that momentum was a vector, subject to component analysis."
"Today we continued reviewing the assignment problems. The student is still having some difficulty with measure conversions. We will review and clarify as needed in our future sessions."
"We continued studying ahead of the final exam. We worked on "lab" problems and colloidal properties problems."