Aim: To distinguish between the forms of energy and sources of energy. To classify the different forms of energy Keywords: Kinetic, Potential What happens to energy: Energy can neither be created nor destroyed, but it transfers from one form to another. When looking at the sheet we can see that when we put energy into something, energy comes out. The energy that has come out has been converted into useful and non-useful energy. For example when energy is put into a chain saw, kinetic energy is produced as a useful energy but heat and sound are also produced as wasted energy. How does Potential gravity work? By looking at the image below, it shows how potential gravity works and how it is released. As the cart moves across the roller coaster tracks the energy is used up. At the start of the roller coaster, the cart has maximum potential gravitational energy. This is because the cart is at the highest point on the roller coaster. At the bottom of the hills there is maximum kinetic energy but when the cart starts to move up the track, it loses the kinetic energy due to air resistance and track friction. By the end of the run, the car has lost all of its kinetic energy because of the friction. By looking at this we can see that the gravitational energy has not disappeared, it has just transformed into heat energy due to the friction. Lesson Summary:
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AuthorStudent from St Augustine's College in Brookvale, NSW ArchivesCategories![]()
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Photo used under Creative Commons from Tovstonog