Answer:

Energy exists in many different forms. Examples of these are: light energy, heat energy, mechanical energy, gravitational energy, electrical energy, sound energy, chemical energy, nuclear or atomic energy and so on. Each form can be converted or changed into the other forms.

Although there are many specific types of energy, the two major forms are Kinetic Energy and Potential Energy.

Kinetic energy is the energy in moving objects or mass. Examples include mechanical energy, electrical energy etc.

Potential energy is any form of energy that has stored potential that can be put to future use. Examples include nuclear energy, chemical energy, etc.

Chemical energy

Chemical energy is energy stored in the bonds of chemical compounds (atoms and molecules).Chemical energy is released in a chemical reaction, often in the form of heat. For example, we use the chemical energy in fuels like wood, coal by burning them.

Mechanical Energy

Mechanical energy is the energy a substance or system has because of its motion. For example machines use mechanical energy to do work.

Thermal energy

Thermal energy is the energy a substance or system has related to its temperature, i.e., the energy of moving or vibrating molecules. For example, we use the solar radiation to cook food.

Nuclear energy

Nuclear energy is the energy that is trapped inside each atom. Nuclear energy can be produced either by the fusion (combining atoms) or fission (splitting of atoms) process. The fission process is the widely used method.

Gravitational Energy

Gravitational energy is that energy held by an object in a gravitational field. Examples include water flowing down a waterfall.

Some forms of energy are more useful than others. Using energy always makes it less useful, even though no energy is actually destroyed. Kinetic energy and electricity are the most useful forms.

Like an automobile only runs on gasoline, the human body runs on only one kind of energy: chemical energy. More specifically, the body can use only one specific form of chemical energy, or fuel, to do biological work – adenosine triphosphate (ATP).