Assertion: There is no effect of rotation of a earth on acceleration due to gravity at poles.
Reason : Rotation of earth is about polar axis.

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false

Answer

A

Explanation

`g.=g=omega^2Rcos^2lamda`, at pole `lamda=90^(@),g_p=g`