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Energy is defined as the ability to do work. However, there is no concept of force that includes all definitions of force. For example, the forces that form light energy, heat (thermal) energy, mechanical energy, electrical energy, magnetic energy, etc. are different. There are many forms of energy, but they all fall into one of two categories: kinetic and potential. Electrical, radiant, thermal, motion, and sound energies are kinetic; chemical, stored mechanical, nuclear, and gravitational energies are types of potential energy. It can exist in the form of motion. This is known as kinetic energy. The motion can relate to different things. If the motion is of a large object, the kinetic energy is said to be mechanical. If moving objects are electrically charged, they are said to form an electric current. If moving objects are individual molecules, there are two possibilities. If their motion is organized into waves, then their kinetic energy is associated with sound. If their motion is completely disorganized, then their kinetic energy is associated with what we call heat or thermal energy. Another form of kinetic energy is light (and other forms of electromagnetic radiation, like radio waves and microwaves). Other forms of energy do not have the form of motion, but they can cause an increase in motion at a later time. Water at the top of a dam can spill over the dam. A battery can produce an electric current when it is connected to a circuit. Fuels can be burned to produce heat. All of these are examples of potential energy.
KeywordsDiesel Engine Wind Turbine Wind Power Corn Stover Wind Energy
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