Two powerpoints. P3.4 is a cheap and cheerful lesson. P3.5 is an activity, inspired by Practical Action, where pupils construct there own turbine and power it with hairdriers to lift mass. Hence they can calculate energy (mgh), power, and use the power of the hairdrier to get an efficiency.\n\nThe pdfs are supported material I used as inspiration supplied by Practical Action. You can find them and more nice shiny ideas at www.practicalaction.org/schools. Thanks to them.
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