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Revista Brasileira de Ensino de Física

Print version ISSN 1806-1117

Abstract

SANTOS, Janilo; OLIVEIRA, Bruna P.W. de  and  NELSON, Osman Rosso. Impedance of rigid bodies in one-dimensional elastic collisions. Rev. Bras. Ensino Fís. [online]. 2012, vol.34, n.1, pp. 1-4. ISSN 1806-1117.  http://dx.doi.org/10.1590/S1806-11172012000100005.

In this work we study the problem of one-dimensional elastic collisions of billiard balls, considered as rigid bodies, in a framework very different from the classical one presented in text books. Implementing the notion of impedance matching as a way to understand efficiency of energy transmission in elastic collisions, we find a solution which frames the problem in terms of this conception. We show that the mass of the ball can be seen as a measure of its impedance and verify that the problem of maximum energy transfer in elastic collisions can be thought of as a problem of impedance matching between different media. This approach extends the concept of impedance, usually associated with oscillatory systems, to system of rigid bodies.

Keywords : impedance; energy transmission; elastic collisions.

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