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Difference between speed and celerity?

  1. Sep 8, 2006 #1
    okay, just a simple question...
    what is the difference between speed and celerity?
    thanks :)
  2. jcsd
  3. Sep 8, 2006 #2


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    To the best of my knowledge "celerity" has no meaning in physics.
  4. Sep 8, 2006 #3


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    In relativity, celerity has been used to describe the quantity [tex]\frac{1}{\sqrt{1-v^2/c^2}}v[/tex], where [tex]v[/tex] is the velocity (whose magnitude is the speed).
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