AQA GCSE Physics

Revision Notes

1.1.2 Examples of Energy Transfer

Examples of Energy Transfer

  • Energy transfers occur all the time in various everyday circumstances
  • Some common situations include
    • When an object is projected upwards
    • When a moving object hits an obstacle
    • When an object is accelerated by a constant force
    • When a vehicle speeds up or slows down
    • When water is brought to a boil in an electric kettle

An Object Projected Upwards

  • Before the ball is thrown upwards, the person holding the ball is a store of chemical energy
  • When the ball is thrown, the chemical energy is converted into kinetic energy as the ball begins to move upwards
  • As the height of the ball increases, the kinetic energy is converted into gravitational potential energy

projected-object-store, IGCSE & GCSE Physics revision notes

A Moving Object Hitting an Obstacle

  • When an object, such as a car, is moving, chemical energy from the fuel is converted into kinetic energy
  • If the object hits an obstacle, such as a car hitting a wall, the speed of the car will decrease very quickly
    • Therefore, the kinetic energy of the car will decrease
  • In this scenario, most of the kinetic energy is converted to heat and sound between the car and the wall

crashing-car-store, IGCSE & GCSE Physics revision notes

A Vehicle Being Accelerated by a Constant Force

  • When a vehicle is stationary, it stores chemical energy in the fuel
  • When the vehicle speeds up, or accelerates, the chemical energy is converted into kinetic energy

accelerating-car-store, IGCSE & GCSE Physics revision notes

A Vehicle Slowing Down

  • When a vehicle is moving, it has kinetic energy
  • As it slows down, or decelerates, the kinetic energy is converted to heat and sound between the tyres and the road

braking-car-store, IGCSE & GCSE Physics revision notes

Boiling Water in a Kettle

  • When an electric kettle is used to heat up water it uses electricity to increase the temperature of the heating element
  • During this process, electrical energy is converted into heat energy

boiling-kettle-store, IGCSE & GCSE Physics revision notes

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Ashika graduated with a first-class Physics degree from Manchester University and, having worked as a software engineer, focused on Physics education, creating engaging content to help students across all levels. Now an experienced GCSE and A Level Physics and Maths tutor, Ashika helps to grow and improve our Physics resources.
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