The angular velocity of the earth with w...

The angular velocity of the earth with which it has to rotate so that the acceleration due to gravity on `60^@` latitude becomes zero is

`2.5xx10^(-3) rad//s`

`5.0xx10^(-1) rad//s`

`10xx10^(1) rad//s`

`7.8xx10^(-2) rad//s`

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