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Homework Help: Why's radial acceleration zero at north pole

  1. Nov 27, 2005 #1
    a)Compute hte radial accleration of a point at the equator of the earth. b)repeat for the north pole of hte earth. Take the radius of the eartk to be 6370 km.

    so for a) i got 9.9337 m/s square which is right
    but for b) the answer is just zero
    why?
     
  2. jcsd
  3. Nov 27, 2005 #2
    You are at the "center" of rotation. You really are not moving anywhere are you? Just spinning...
     
  4. Nov 27, 2005 #3

    lightgrav

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    Whoa!

    What Force could cause an acceleration as quick as 9.934 m/s^2 ?

    I don't recall having to be tied down in Equador, to stay on the ground. (;->
     
  5. Nov 27, 2005 #4

    Tide

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    Yeah, but have you actually ever BEEN to the equator? ;)
     
  6. Apr 11, 2011 #5
    Your part "a" isn't correct it says you need to find the acceleration not velocity, the velocity you find also incorrect.
     
  7. Apr 19, 2011 #6
    hey.there's zero acceleration at poles because the R in the mrw^2 is approaching zero.or rather zero in this case.as it reaches the pole, the centripetal radius becomes zero, Fc=0 therefore, no acceleration.hope this helps.heh i'm new here.
     
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