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Does v represent speed in kinetic energy formula?

  1. Apr 30, 2015 #1
    Since kinetic energy is in is a scalar quantity in joules, then is the v in (1/2)mv2 speed or velocity?
  2. jcsd
  3. Apr 30, 2015 #2


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    Science Advisor

    Either will work. If it is taken as a scalar then you would use scalar multiplication to compute v2 If it is taken as a vector then the vector dot product ##v{\cdot}v## will produce the same result.
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