In the following video, Paul Andersen explains how energy can neither be created nor destroyed but may be transferred. Energy comes in many forms. [4:09]

An introduction to the definition of energy as it relates to physics. [1:22]

Watch this video which provides example problems using the simplified conservation of energy equation. [7:47]

Energy comes in many different forms. It can be stored in the chemical bonds that hold molecules together, carried in the motion of a spinning wheel, or held in a boulder sitting on a cliff. But energy isn't a fixed thing. In fact, we...