physics unit 1- useful energy

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  • energy exists in many forms- kinetic, light, sound, heat, nuclear, electrical, gravatational potention, elastic potential and chemical
  • energy can be transferred from one form to another
  • its impossible to create or destroy energy
  • conservation of energy- means that the total energy is the same because energy is only transferred
  • e.g when an object falls= GPE--->KINETIC
  • a machine is something that transfers energy from one place to another
  • a…

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