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Calculate angular velocity of earth so t...

Calculate angular velocity of earth so that acceleration due to gravity at 60° latitude becomes zero. (Radius of earth = 6400 km, gravitational acceleration at poles = `10 m//s^2, cos 60^(@)= 0.5)`

A

`7.8 xx 10^-2 rad/s`

B

`0.5 xx 10^-3 rad/s`

C

`1 xx 10^-3 rad/s`

D

`2.5 xx 10^-3 rad/s`

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