GPE and KE Gravitational Potential Energy (GPE) Kinetic Energy (KE)

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Presentation transcript:

GPE and KE Gravitational Potential Energy (GPE) Kinetic Energy (KE) This is the energy an object possesses due to its height above the ground. Kinetic Energy (KE) This is the energy an object has due to its speed. When an object falls it converts its potential energy into Kinetic energy. The GPE of water in a dam can be extracted as it falls.

Elastic Potential energy (EPE) Any material that is stretched or compressed stores elastic potential energy. A wound up clock spring can be used to store elastic potential energy. This energy can then released over a few days to make the clock work. Both the springs in a car suspension and the tyres absorb energy when the car travels over rough ground. The bungee cord is elastic and absorbs the kinetic energy of the jumper.

Chemical Energy Chemical energy is the energy stored in the bonds between atoms. Making the bonds between atoms can store energy. Breaking the bonds between atoms can release energy. The chemical bonds inside food can be broken down to release energy for us to live. The chemicals inside a battery store chemical energy ready to be released as electricity.

Heat Energy When chemical react they can release chemical energy in the form of Heat energy. For example burning wood/coal releases chemical energy as heat. Heat can be described as the KE and EPE of molecules.

Electrical Energy Electrical energy is the flow of charge/electrons in a circuit due to a voltage. Printed circuit board in a TV Lightning Bolt Lightning is an example of nature producing its own electric currents in the atmosphere.

Sound Energy The vibrations which are passed between atoms in a material we call sound.

Electromagnetic Waves Gamma rays X- rays UV Infra-red Radio Waves

Nuclear Energy The strong bonds between the particles inside a nucleus store nuclear energy. When the bonds are broken during a nuclear reaction a lot of energy can be released. (About a million times more than a chemical reaction) In a nuclear bomb all the energy in a lump of Uranium or Plutonium is quickly released. In a nuclear reactor the energy is released slowly so that it can be used to generate electricity.