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Kinematics of Rotational Motion

  1. Dec 6, 2009 #1
    1. The problem statement, all variables and given/known data
    A turntable that is initially at rest is set in
    motion with a constant angular acceleration
    α.
    What is the magnitude of the angular ve-
    locity of the turntable after it has made one
    complete revolution?


    2. Relevant equations
    w(omega)^2 = w(omegeInitial)^2 +2α(delta)θ


    3. The attempt at a solution
    So then I used that because one revolution is equal to 2pi, I said w = sqrt. (4piα).
    It is multiple choice and that is not one of the choices.
    Here are the choices:
    1. k~ωk = 2 π α
    2. k~ωk = √2 π α
    3. k~ωk = 2 α
    4. k~ωk = 2√π α
    5. k~ωk = √2 α
    6. k~ωk = 4 π α
    What am I doing wrong? Sorry if it is tough to read.
     
  2. jcsd
  3. Dec 6, 2009 #2

    rock.freak667

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    Not sure if you typed out the choices properly,but you can simplify you answer even more since √(ab) = (√a)*(√b)
     
  4. Dec 6, 2009 #3
    Oh, I forgot to simplify, do it would be 2√π α
     
  5. Dec 6, 2009 #4

    rock.freak667

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    if you mean 2√(πα), then yes
     
  6. Dec 6, 2009 #5
    Yeah, thats what I meant. BTW, how do you type those symbols (I copy and pasted the symbols I could).
     
  7. Dec 6, 2009 #6

    rock.freak667

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    If you meant LaTex, in the reply box click on the [itex]\sum[/tex] symbol and you will get the list of symbols.
     
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