Question

When you move from equator to pole, the value of acceleration due to gravity $(g)$ :

• A. increases
• B. decreases
• C. remains the same
• D. increases then decreases

Answer 1

Answer: (A)

Equatorial radius is about $21km$ larger than polar radius.
Earth is not a perfect sphere but some what flat at the two poles. Its equatorial radius is nearly $21km$ 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.