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Homework Help: Rearranging period of pendulum equation to find length

  1. Jul 11, 2012 #1
    1. The problem statement, all variables and given/known data What is
    T=2pi[(sqrt)l/g] rearranged for l= ?

    2. Relevant equations

    3. The attempt at a solution
    Ive tried a few but I just dont know how to do this with sqrt's of a fraction involved.
  2. jcsd
  3. Jul 11, 2012 #2
    Eliminate the square root by squaring both sides.
  4. Jul 11, 2012 #3
    Ok,so what I end up with after that is l=T^2g/2pi. Which is wrong as its not giving me the correct answer.
  5. Jul 11, 2012 #4


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    Homework Helper
    Gold Member
    2017 Award

    When you square both sides, don't forget that you also have to square the factor of 2[itex]\pi[/itex]
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