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Unit of mean square velocity

  1. Feb 13, 2013 #1
    we know the unit of velocity is m/s2
    while calculating the mean square velocity we find the average(or mean) of the 'squares' of the given velocities.
    then the unit of MEAN SQUARE VELOCITY should be 'm2/s4'
    then how come its unit is also m/s2 and not m2/s4 ?
  2. jcsd
  3. Feb 13, 2013 #2


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    i think that it's m/s.
  4. Feb 14, 2013 #3


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    The unit of velocity is m/s. m/s2 is for acceleration.
    The unit of the mean of square velocity is m2/s2, but we ususally speak about root-mean-square (RMS) velocity or speed - and it is m/s.

  5. Feb 14, 2013 #4
    OOOPS..!! yeah sorry i made a mistake .:redface: the unit for velocity is m/s..

    but is the unit of mean square velocity really m2/s2 ????
    (i mean, i just want to confirm. because in my book the unit of mean square velocity is given as m/s...:confused:... so the book must be wrong .)
  6. Feb 15, 2013 #5


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    Mean square velocity is the average of the squared velocity. If it is square velocity , the unit is m2/s2. It can be a typo in your book, or they meant root-mean square velocity.

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