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Longitudinal and Transverse Mass

  1. Feb 13, 2004 #1
    I don't recall what thread it was in but there was a comment that F = ma for a relativistic mass. I stated it was incorrect but did not provide a proof since it was a bit involved and too mathy for latex so instead of doing the latex out I made a new web page. For the derivation of the correct relationship between force and acceleration please see

  2. jcsd
  3. Feb 15, 2004 #2
    Hi, Petey.

    Another way of looking at it is that F=ma is still true but the force actually applied to the moving mass is diminished. Force can only be delivered at the speed of light.

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