Lecture: the unit that didnt make it
Presenter: Andy Jackson, Harrisonburg High School, ajackson[ at symbol ]harrisonburg.k12.va.us Lecture with Q&A to develop understanding of the concept of electrical potential and the unit of the Volt. I then move on to fill in the chart and review the concepts of energy. Since at this point of the year I have already taught force and energy, these are filled in by student response to my questions. After completing the energy row the class and I discuss the concepts of gravitational potential energy of objects sitting on my desk (1 m high). The first two objects are standard 100g, 1000g masses. This line of discussion then leads to asking what the energy of another object, say a stapler is. We discuss why we dont know and what wed need to know to answer the question. All review. I then explain to the class that I have developed an new concept to take care of this problem the energy per kg of the objects the gravitational potential of the objects. The lesson proceeds as I develop and fill in the rows for gravitational potential. I explain that this is so important and catches on so well that people name the unit after me and eventually refer to gravitational potential as Jacksonage. I then go through the process of reviewing concept of charge and developing the concept of electrical potential in a parallel manner to the fictitious jacksonage |
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