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Centrifugal force question! need help!

  1. Dec 7, 2009 #1
    Calculate the centrifugal acceleration associated with

    a.) The rotation of the Earth around its axis, as measured on the equator
    b.) The Earth moving around the Earth-Sun centre of mass. Assume the orbit is circular
    c._ The Sun moving around the Earth-Sun centre of mass. Same assumption as in b.)

    Work shown...

    i'm so confused with centrifugal and centripetal acceleration... but this question is asking for 'centrifugal' accel.

    for a.) i did a_z= (omega^2)*(x)
    where omega= sqrt (G*(M+m))/(r^3))

    i don't understand how measure this since it's at the equator

    for b.) do i simply use the weight of the earth, earth, and distance from the earth to the sun.. and sub in

    for c>0 do i simply use the weight of the sun, earth, and distance from the earth to the sun.. and if so what's the difference

    need a lot of help here.. please help!!!



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



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    3. The attempt at a solution
     
  2. jcsd
  3. Dec 7, 2009 #2

    tiny-tim

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    Hi johnq2k7! :smile:
    "Centrifugal" just means the opposite of centripetal … it's a daft way of asking the question, like "A rocket is launched into space: what is its speed downwards?" :rolleyes:
    no, this is geometry, not physics …

    you're not asked why is there acceleration (gravity etc), only what is the acceleration …

    for that, you only need to know the length of the day and the year (and you can look that up in a diary :wink:), and the distances involved. :smile:
     
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