Objectives:
5. Determine whether a work integral is independent of path.
6. Define a conservative vector field and its potential function, and recover the latter given the former.
Ch 16 playlist: https://www.youtube.com/playlist?list=PLGOk2-zeLtjCT6PfbdnG6ORkZXFLXmx8Z
PDF copy of the notesheets: https://drive.google.com/file/d/105IeGB4pweqjfTQ29Oab0X03sn09N8uv/view?usp=sharing