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Rotational energy

  1. Sep 7, 2008 #1
    1. The problem statement, all variables and given/known data
    Humanity uses energy at the rate of about 10^{13} \rm W.If we found a way to extract this energy from Earth's rotation, how long would it take before the length of the day increased by 1 minute?
    Express your answer using one significant figure.


    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Sep 8, 2008 #2

    tiny-tim

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    Hi ingy489! :smile:

    What is the rotational energy of the Earth now?

    What would it be if the day was 1 minute longer? :smile:
     
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