Energy is a unifying concept in physical science. It allows us to make connections between different ways of thinking about the natural world, and to treat everything on an equal basis. Energy principles in mechanics also help us to understand and predict the behavior of complex systems that would be very difficult to analyze using only Newton's laws.
You are responsible for the learning objectives and the concepts and definitions that appear in the vocabulary list. You are also responsible for everything in the unit reading assignment.
You need to demonstrate your understanding on each section of the unit by successfully completing the qualification assignment for that section.