Lesson 2 moves into the Research and Revise step and focuses on the conservation of energy solely between gravitational potential energy and kinetic energy. Students start out with a virtual laboratory, and then move into the notes and working of problems as a group. A few questions are given as homework. A dry lab focuses on the kinetic and potential energies found on a roller coaster concludes the instructional activity in the Test Your Mettle phase of the Legacy Cycle.