In this clip, the students are gathered around in a whiteboard circle. One student is explaining her group’s work regarding deriving the formula for kinetic energy. The professor asks her to go into detail of her derivation. She then explains in detail how they arrived at the formula.
This clip takes place during week 6 (Becoming Quantitative with Energy). The problem that the student is discussing is the one on the “Investigating Energy Conservation” lab worksheet which asks to derive the kinetic energy formula.