Foundations of Physics

, Volume 6, Issue 1, pp 115-124

First online:

The classical and relativistic concepts of mass

  • Erik EriksenAffiliated withInstitute of Physics, University of Oslo
  • , Kjell VøyenliAffiliated withInstitute of Physics, University of Oslo

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An elementary presentation is given of classical and relativistic collision dynamics based upon the principle of conservation of momentum. The concepts of mass are shown to be implicitly defined and their basic properties are rigorously derived and discussed. Luxons and tachyons are treated on the same footing as material particles.