Physics P1 Using Energy


  • Created by: Phoebe
  • Created on: 06-06-12 16:24

2.1 Forms of Energy

  • Energy exists in different forms
  • Energy can change from one form to another
  • When an object falls and gains energy its gravitational potential energy decreases and its kinetic energy increases
  • Energy cannot be created or destroyed

Different forms of energy:

  • Chemical energy (stored in fuel and released when chemical reactions take place)
  • Kinetic energy (energy of a moving object)
  • GPE (the energy of an object due to its position)
  • Elastic potential energy (the energy stored in a springy object when we stretch or squash it)
  • Electric energy (energy transferred by an electrical current) 
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2.3 Useful energy

  • Useful energy is energy in the place we want it and in the form we need it
  • Wasted energy is energy that is not useful energy
  • Useful energy and wasted energy both end up being transferred to the surroundings, which become warmer
  • As energy spreads out, it becomes more and more difficult to use it for further energy transfers
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