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EnglishThis paper deals with some of the difficulties involved in correctly linking the mechanical and thermodynamic descriptions of situations where there are bodies in motion and changes in temperature and/or heat exchanges. It proposes and discusses a definition of internal energy and shows that the total work of the non-conservative forces, such as frictional forces, always equals zero. The energy balances of two bodies in motion in the presence of sliding friction are analysed in this way; the calculation of the work of frictional forces is discussed, taking into account the mesoscopic level.
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http://hdl.handle.net/11571/103961| Titolo: | Work and Energy in the Presence of Friction: The Need for a Mesoscopic Analysis |
| Autori interni: | BESSON, UGO |
| Data di pubblicazione: | 2001 |
| Rivista: | EUROPEAN JOURNAL OF PHYSICS |
| Abstract: | This paper deals with some of the difficulties involved in correctly linking the mechanical and thermodynamic descriptions of situations where there are bodies in motion and changes in temperature and/or heat exchanges. It proposes and discusses a definition of internal energy and shows that the total work of the non-conservative forces, such as frictional forces, always equals zero. The energy balances of two bodies in motion in the presence of sliding friction are analysed in this way; the calculation of the work of frictional forces is discussed, taking into account the mesoscopic level. |
| Handle: | http://hdl.handle.net/11571/103961 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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