Pre-reading question: Watch the video below, and answer this question: How does the “Magic Rollback Can” work?
Spring Potential energy:
Gravitational Potential Energy:
Textbook reading: This may seem like a strange reading assignment, but the three items in the margin of page 222 contain more useful information that the section on Potential Energy itself. So take a look at figure 8-7 and its caption, the problem-solving note and the figure at the bottom with its caption.
Post-reading question: Conceptual question 1 on page 243.