Energy is a fundamental concept in physics that refers to the ability to do work. Work is defined as the application of a force to move an object in the direction of the force. Energy can be transformed from one form to another, but the total amount of energy remains the same, according to the law of conservation of energy. Energy can be classified into two general types:
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Potential energy: This is energy that is stored and has the potential to do work. Examples include chemical, gravitational, mechanical, and nuclear energy.
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Kinetic energy: This is energy in motion and includes electrical energy, heat, light, and sound.
There are many forms of energy, including heat, light, motion, electrical, chemical, and gravitational. Energy is measured in joules (J) in the International System of Units (SI) . Energy is a conserved quantity, meaning it can be converted from one form to another, but it cannot be created or destroyed.
