A) Remain same
B) Increase
C) Decrease but not zero
D) Decrease zero
Correct Answer: A
Solution :
Variation in g due to rotation of earth \[g'=g-{{\omega }^{2}}R{{\cos }^{2}}\lambda \] At poles\[\lambda =90{}^\circ \]in the above expression, we get \[{{g}_{pole}}=g-{{\omega }^{2}}R{{\cos }^{2}}90{}^\circ \] \[\therefore \] \[{{g}_{pole}}=g\] ie, there is no effect of rotational motion of the earth on the value ofg at poles.
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