To demonstrate the potential energy of a wound up spring and its conversion into electrical energy by driving a dynamo and connecting its output to a bulb. It can also be used by winding up a weight on a cord to demonstrate the conversion of potential energy into kinetic energy and back to potential in the raised weight. It consists of a spring attached to free wheel which drives a pulley. Weight can be attached to the shaft by fixing a thread or using screw at the end of a shaft. Supplied complete with driving belt.Base : Plastic, 220x 100 mm (length x width)
Pulley : Made of aluminium, 56 mm dia.