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Copy of Potential Energy

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Jessica Tynan

on 11 May 2016

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Transcript of Copy of Potential Energy

Properties of Potential Energy
Potential energy is defined as the energy of position between two interacting objects. An object gains potential energy when work is done against a force. Potential energy comes in many different forms including:

elastic potential energy
gravitational potential energy
chemical potential energy
magnetic potential energy
electrical potential energy
Elastic Potential Energy
Potential energy that results from stretching or compressing an object is called elastic potential energy. For example, when a spring is stretched, work has been done to deform the spring, resulting in increased potential energy. When the spring is released, the potential energy will be transformed to kinetic energy as the spring snaps back into its original shape. This is also true of a spring that is compressed.
Gravitational Potential Energy
Potential energy that is related to an object's height above the ground is known as gravitational potential energy. Generally, an object's gravitational potential energy is directly proportional to the object's mass, height, and the acceleration due to gravity. When two object's masses are equal, the object with the greater height has the greater gravitational potential energy.
Chemical Potential Energy
Chemical potential energy is the energy of the bonds and attractions within and between the atoms that make up molecules. When a substance undergoes a chemical reaction, chemical potential energy is released.
Potential Energy
Potential Energy
Potential energy is the energy of position.
Chemical Potential Energy
Chemical potential energy is the type of energy that humans and other organisms get out of food. The food we eat contains chemical energy, and oxidation of the food through cellular respiration releases this energy for use in our bodies. Different substances contain different amounts of chemical energy. As a result, some substances are more likely than others to undergo chemical changes.
Chemical Potential Energy

Substances that can be burned, such as fossil fuels and wood, also contain chemical potential energy. So when coal, oil, wood, or natural gas are burned, their chemical potential energy is released.
Magnetic Potential Energy
Magnetic objects have two poles. One is assigned a positive charge, and one is assigned a negative charge. Two magnetic objects that are close enough together to interact have magnetic potential energy that depends on the position of the objects relative to one another.
Magnetic Potential Energy
Magnetic potential energy is greatest when:

like poles of two different magnetic objects are close to one another.
opposite poles of two different magnetic objects are as far away as they can be while still interacting.
Magnetic Potential Energy
In the diagrams above, two magnets are being held close together. In the first photo, the opposite poles of the two magnets are facing. In the second photo, the like poles are facing. Iron filings in both photos show the shape of the magnetic field between the two magnets.
Electrical Potential Energy
Electrical potential energy is associated with the relative positions and charges of a pair of electrically charged particles. For two particles with the same charge, the potential energy increases as the distance between the particles decreases.
Electrical Potential Energy
Electrical potential energy is similar to gravitational potential energy. Both energies exist because the relative positions of two objects give the objects the ability to do work.
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