Motor / Generator Unit. This unit can be used for variety of purposes to illustrate energy transfers: it can be used to lift mass or stretch bungee cord, and to generate an electrical current when the mass falls again or the bungee cord is released. It can also be turned by hand to generate current. The motor/generator (6-9 V) is mounted on robust metal base, and the gearing of the unit and the sizes of the pulleys have been chosen to enable variety of qualitative and quantitative experiments to be undertaken.
