power and energy transfer

• the energy stored when repelling poles are moved closer together or attracting poles are moved apart

  magnetic potential energy store
• the energy stored when repelling charges are moved closer together or attracted charges are moved apart

  electrostatic energy store
• energy stored in the nucleus of an atom

  nuclear energy
• when work is done, a force is applied and the object moves

  mechanically
• when a current flows through a potential difference


  electrically
• when thermal energy transfers from hot to cold objects

  heating
• when an object releases a wave

  radiation
• energy cannot be created or destroyed - only transferred

  conservation of energy
• joules


  energy unit
• 0.5 x mass x (speed)2

  kinetic energy
• mass x gravity x height

  gravitational potential energy