We reviewed the homework problems. We continued our discussion of energy and
introduced the idea of work, deriving the relationship known as the "work
kinetic energy theorem."
We distinguished between conservative and non-consrvative forces. We discussed how the same problem might be
viewed differently depending on what factors one decides to include in one's "system" and the subsequent
identification of forces as being internal or external to that system. We introduced the concept of potential
energy.
