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Is there maximal value for kinetic energy ?

  1. Oct 16, 2012 #1
    Is there a limit on value of kinetic energy ?
    Ek= [itex]\frac{mv^2}{2}[/itex] maximal mass ?

    Something like plank length , plank temperature ...etc
  2. jcsd
  3. Oct 17, 2012 #2
    Short answer: No

    Long answer: Kinetic energy is unlimited. But if you use really high speed you need to use the relativistic version:

    [itex] \frac{{mc^2 }}{{\sqrt {1 - \frac{{v^2 }}{{c^2 }}} }} - mc^2 [/itex]

    As you can see, if a massive particle travels at [itex]v=c[/itex], kinetic energy becomes ∞.
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