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Thermodynamical asymmetries in whirling, jumping and walking

Authors: J. Güémez, M. Fiolhais

Ref.: European Journal of Physics 35, 035008-(10pp) (2014)

Abstract: We analyze, from the thermodynamical point of view, mechanical systems in which there is the production of mechanical energy due to an internal source of energy, and compare that analysis with a similar one for the ‘symmetric’ motion that occurs with energy dissipation. The analysis of the energetic asymmetries is instructive to put in evidence the role of thermodynamics even in the discussion of mechanical aspects.We illustrate the discussion with the wellknown example of a person on a rotating platform outstretching and contracting his or her arms, and also with other common situations such as jumping and walking. Video-abstract available in the EJP article webpage and also available at http://www.youtube.com/watch?v=5OyZSfY4WXQ

DOI: 10.1088/0143-0807/35/3/035008

URL: www.youtube.com