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Acceleration in terms of velocity and radius?

  1. Sep 13, 2008 #1
    Acceleration in terms of velocity and radius??!

    1. The problem statement, all variables and given/known data

    Which one of the quantities below has dimensions = [(ML)/(T^2)]

    MV
    MV^2
    (MV^2)/R
    MRV
    (MV^2)/(R^2)



    2. Relevant equations

    My physics textbook defines 3 basic dimesions: M = Mass. T = Time. L = Length.



    3. The attempt at a solution

    I know that [(ML)/(T^2)] = mass x acceleration. Each of the 5 possible answers has an "M" which is mass. Therefore, I'm assuming that acceleration must be expressed in terms of
    "R" (which I think might be radius) and V (which I think is velocity).

    Is this line of thinking correct? As in, can acceleration be expressed in terms of Velocity and Radius? Or is this line of thinking way off the mark?
     
  2. jcsd
  3. Sep 13, 2008 #2

    Kurdt

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    Staff Emeritus
    Science Advisor
    Gold Member

    Re: Acceleration in terms of velocity and radius??!

    What re the units of velocity. What units is the radius expressed in? Once you know that, try looking at which of the options units combine to give you what you want.
     
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