If earth is supposed to be a sphere of radius R, if $g_{30}$ is value of acceleration due to gravity at latitude of $ 30^\circ$ and g at the equator, the value of $g - {g_{{{30}^o}}}$ is
If earth is supposed to be a sphere of radius R, if $g_{30}$ is value of acceleration due to gravity at latitude of $ 30^\circ$ and g at the equator, the value of $g - {g_{{{30}^o}}}$ is
- A
$\frac{1}{4}{\omega ^2}R$
- B
$\frac{3}{4}{\omega ^2}R$
- C
${\omega ^2}R$
- D
$\frac{1}{2}{\omega ^2}R$
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