energy transfer examples

• what is conservation of energy law?

  Energy cannot be created or destroyed, only transferred or transformed.
• What fuel is burned in a coal fire?

  Coal
• What type of energy does coal primarily store?

  Chemical energy
• What happens to the chemical energy when coal is burned?

  It is converted to thermal energy
• How is energy transferred from coal during burning?

  By heating to the thermal energy store
• What are the two ways hot coals and flames transfer energy to the surroundings?

  By heating and radiation
• What is the process of energy transfer in a coal fire?

  • Coal burns to produce heat
  • Chemical energy in coal is converted to thermal energy
  • Hot coals and flames transfer energy to surroundings
  • Energy transfer occurs through heating and radiation
• What is the initial speed of the car in the scenario?

  15 m/s
• What happens to the car's kinetic energy when it slows down?

  It decreases
• What type of energy does the car have while moving?

  Kinetic energy
• What do the brakes do to the car to slow it down?

  They mechanically do work
• What happens to the thermal energy store of the brakes during braking?

  It increases
• What is the energy transfer process when a car brakes?

  • Car has kinetic energy
  • Brakes do work on the car
  • Kinetic energy decreases
  • Thermal energy of brakes increases
• What action does the archer perform to prepare to shoot?

  The archer pulls the string back
• What happens when the archer releases the string?

  The arrow is fired from the bow
• What is the energy transfer process when an archer fires an arrow?

  • Chemical energy in muscles is converted to elastic potential energy in the bow.
  • Elastic potential energy is converted to kinetic energy of the arrow upon release.
• What type of energy is stored in the archer's muscles?

  Chemical energy
• What type of energy is stored in the bow when the string is pulled back?

  Elastic potential energy
• What type of energy does the arrow possess when it is fired?

  Kinetic energy
• How does the energy transfer occur from the archer to the arrow?

  Through mechanical transfer of energy