Recent Tutoring Session Reviews
"We skipped past one chapter in the student's physics book to cover energy. I covered the work-energy theorem and introduced energy as a different perspective on the same idea. We covered several examples: I explained the minimum-potential-energy principle (drag forces sucking out all the energy), and its limitations with static friction and local minimums. We then derived the buoyancy condition from that. We talked a little about some particle collisions and then I showed that conserving both momentum and energy leads to this v1 * v2 = 0 equation that underlies the strange "stopping" seen in a Newton's cradle. I showed some of the basic ideas behind gravitational assists, and showed how last week's leverage equations turned out to just enforce an energy conservation through the lever, as the works balanced. We also covered the question of whether two cars crashing into each other leads to more carnage than one car crashing into a wall, and why the "oh, v^2 means there's 4 times the energy" argument fails (because in that reference frame the final kinetic energy is not zero). We also went through the textbook page-by-page; they used integral calculus to derive the work-energy theorem while I had used derivatives, but otherwise it was easy enough to understand."
"We discussed momentum space and its relationship to energy, how energy makes momentum possible, and the role of heat in dissipating energy."
"We covered unit conversions and 1D kinematics. The student seemed to understand the material well and just needs to continue to practice. We worked on practice problems together."