Understanding Energy

What is Energy?
Energy is the capacity of matter to perform Work as a result of its motion or position. The Energy possessed by matter as a result of its motion is known as Kinetic Energy, and that possessed as a result of position is Potential Energy. A moving car possesses Kinetic Energy which greatly depends on its mass and velocity of travel. A stone suspended at a certain height above the ground possesses Potential Energy which depends on its height above the ground, its mass and acceleration due to gravity.

What are the Types/Forms of Energy?
Energy exists in different forms such as Chemical, Electrical, Mechanical, Light, Heat, Sound and Nuclear Energy.
The various forms of Energy are easily converted from one form to another, for example Electrical Energy is converted to Light Energy using the electric bulb.
More on conversions later.