All Class Clips content is available to watch on mobile, tablet and desktop devices on our new Knowledge & Learning BETA website.
The conservation of energy
The presenters act out a scene in an old detective movie to explain why you cannot lose energy – it just gets transferred. In a car engine 30% of the energy from the petrol is converted into kinetic energy to produce movement – the rest of the petrol's energy is converted to heat and sound energy. This is linked to the 'principle of the conservation of energy' in which energy cannot be created or destroyed.
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.