energy stores & systems

• what is a system?

  an object or group of objects
• There are changes in the way energy is stored when a system changes
• what changes are involved in the way energy is stored when an object is projected upwards

  • it will initially have kinetic energy
  • as the object rises, kinetic energy will be transferred into gravitational potential energy
  • at its highest point, the gravitational potential energy will all be converted into kinetic energy as the object falls back down to the ground

  
• what changes are involved in the way energy is stored when a moving object hits an obstacle?

  • it will initially have kinetic energy
  • once it hits an obstacle, kinetic energy can be transferred into many types of energy e.g. it can be transferred to the surroundings as thermal energy and sound waves, some of the kinetic energy can be transferred to the obstacle, causing it to move

  
• what changes are involved in the way energy is stored when an object is accelerated?

  • when an object is accelerated, there is a transfer of energy
  • energy is required to accelerate the object e.g. chemical , thermal , electrical
  • this energy will be converted to kinetic energy

  
• what changes are involved in the way energy is stored when an object is decelerated?

  • kinetic energy is transferred into another source of energy e.g. sound waves , thermal energy

  
• what changes are involved in the way energy is stored during heating?

  • transfer of electrical energy into heat energy