1.

The effect of rotation of the eath on the value of acceleration deu to gravity g isA. maximum at the equator and minimum at the polesB. minimum at the equator and maximum at the polesC. maximum at both polesD. minimum at both poles

Answer» Correct Answer - A
As `g=g-omega^(2)R cos^(2) lambda`
The latitude is denoted by `lambda` for poles `lambda=90^(@)` and for equator `lambda=0^(@)`
(i) substituting `lambda=90^(@)` in the above expression we get
`g_("poles")=g-omega^(2)R cos^(2) 90^(@) rarr g_("pole")=g`
i.e there is no effect of rotational motion of the earth on the value of g at the poles
(ii) substituting `lambda=0^(@)` in the above expression we get
`g_("equator") =g-omega^(2) cos^(2) 0^(@)=g-omega^(2)R`
i.e the effect of rotation of earth on the value of g at the equator is maximum


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