A simple and effective magnetic dynamometer to teach Newton’s third law
| Autor: | P. R. Scomparin, J. T. Carvalho-Neto |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Third law
Dynamometer media_common.quotation_subject Teaching method 05 social sciences 050301 education General Physics and Astronomy Cornerstone Common sense 01 natural sciences Education Magnetic field Simple (abstract algebra) Concept learning 0103 physical sciences Calculus 010306 general physics 0503 education media_common |
| Zdroj: | Physics Education. 53:065002 |
| ISSN: | 1361-6552 0031-9120 |
| DOI: | 10.1088/1361-6552/aad67e |
| Popis: | Newton's laws of mechanics are a cornerstone in the development of modern science and its learning can be the very first opportunity for students defy their common sense perceptions and replace them with a more robust world view. However, despite their fundamental importance, many studies demonstrate how difficult is the true comprehension of the basic aspects of Newton's laws. Therefore, any effort to increase the possibilities of teaching them is welcome. It is in this sense that we propose an experimental apparatus to assist teachers in the specific case of the Newton's action-reaction third law. Our system is formed by a pair of dynamometers made from a flexible plastic strip to where small neodymium magnetic disks are attached. Forces are exchanged by means of the magnetic fields and the plastic strip deflection angle indicates the force magnitudes. This is a very cheap, easy to build and effective arrangement, suitable for numerous classes that demand many experimental kits. |
| Databáze: | OpenAIRE |
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