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Circular Motion of the Earth around the sun

  1. Sep 23, 2012 #1
    1. The problem statement, all variables and given/known data


    What is the period of Earth's (nearly) circular motion around the Sun?


    (2*pi*r)/T

    1 year

    (1 year)/(2*pi)

    (2*pi)/(1 year)

    2*pi*(1 year)

    2. Relevant equations

    There is only one speed that a satellite can have if the satellite is to remain in an orbit with a fixed radius.

    Fc=G(mMe/r^2) =mv^2/r

    3. The attempt at a solution

    I am leaning towards 1 year...
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Sep 23, 2012 #2

    rock.freak667

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    Homework Helper

    Well you should, as 1 year is the time take for the Earth to make one revolution around the Earth! So you didn't need to do anything with the 2*pi.
     
  4. Sep 23, 2012 #3

    Redbelly98

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    Staff Emeritus
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    Welcome to Physics Forums :smile:

    I am a little confused. We already know that the period is 1 year, from the basic definition of a year. Was there any more instruction given with the question? Are you supposed to use the radius of Earth's orbit, or the speed of Earth in its orbit, or something along those lines?
     
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