energy stores

• system


  an object or group of objects

  • when a system changes - the way energy is stored also changes
• examples:

  ball rolling and hitting a wall:

  • system - moving ball
  • when it hits the wall, some of kinetic energy is transferred as sound

  vehicle slowing down:

  • system - vehicle moving
  • when it slows down, kinetic transfers to thermal due to friction between wheels and brakes