Module 4: Energy

You have learned how to analyze motion in terms of force, velocity and acceleration. These concepts have been well understood since the time of Sir Isaac Newton; however, there is another set of tools that increases your ability to analyze objects in motion. The concepts of work, energy, and power will help you to understand and predict the behavior of objects in motion.

In this module, you will learn to calculate certain types of energy and understand how energy can be converted from one form to another through work. You will see that energy concepts can help us to better analyze the world around us.

Pre-Assessment:

Most roller coaster rides begin with the car being pulled up a large hill by a chain mechanism.  This hill is usually the highest hill on the entire ride, unless another chain or lifting device is used. Using your own words, go to the discussion board and explain why this is the case.

Make your initial post, then return to the discussion board several times over the next few days to read your classmates’ posts. Reply to at least two of them, being sure to offer new insights, ask questions, and encourage further conversation.

Key Vocabulary:

To view the definitions for these key vocabulary terms, visit the course glossary.

Closed System	Gravitational Potential Energy	System
Conservation	Joule	Total Mechanical Energy
Conservative Force	Kinetic Energy	Transformation
Efficiency	Mechanical Energy	Watt
Elastic Potential Energy	Non-Conservative Force	Work
Energy	Power	Work Kinetic Energy Theorem