Question

Why does the value of g is more at poles than at equator of the earth

Answer 1

As you know that, 
                   g=GM/R*R
here,
    'g' stands for acceleration due to gravity 
     'G' stands for gravitational constant
      'M' stands for mass of the earth
      'R' stands for radius of the earth
from the above equation, 
         Radius of the earth 'R' is inversely proportional to 'g'
          As you we know earth is not completely circular but elliptical in shape 
          It is flattened at poles so 'R' is less at poles than at equator
        Therefore,                             less value'R'=more value of'g'
        Hence, the value of'g'is more at the poles than equator.

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