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Q.
When you move from equator to pole, the value of acceleration due to gravity (g):
Gravitation
Solution:
Key Idea: Equatorial radius is about 21 km larger than polar radius. Earth is not a perfect sphere but some what flat at the two poles. Its equatorial radius is nearly 21 km larger than polar radius. Also the value of g depends upon $ {{R}_{e}} $ (radius of earth) as $ g=\frac{G{{M}_{e}}}{R_{e}^{2}} $ Hence, as we go from equator towards the poles the radius $ {{R}_{e}} $ goes on decreasing and hence the value of g goes on increasing.