Energy & work done

• Types of energy stores:

  • Nuclear
  • Chemical
  • Thermal
  • Kinetic
  • Magnetic
  • Electrostatic
  • Gravitational potential
  • Elastic potential
• Conservation of energy: Energy cannot be created or destroyed, only transfered or dissipated
• Energy is the amount of work done and its measured in Joules (J)
• Power - the rate at which energy is transferred or work is done over a period of time
• Work done refers to the energy transfer that occurs when a force is used to move an object by a certain distance
• P=E/t - (power)

  P- power (Watts, W)

  E- energy (Joules, J)

  t- time (seconds, s)
• Unit of power is Watts, W