Test Academy | The angular velocity of the earth with which it has to rotate so that acceleration due to gravity on 60° latitude becomes zero is (Radius of earth = 6400 km. At the poles g = 10 ms⁻²) 2.5×10⁻³ rad/sec, 5.0×10⁻¹ rad/sec, 10 x 10¹ rad / sec, 7.8 x 10⁻² rad / sec

Question

The angular velocity of the earth with which it has to rotate so that acceleration due to gravity on 60° latitude becomes zero is (Radius of earth = 6400 km. At the poles g = 10 ms⁻²)

Options :

2.5×10⁻³ rad/sec
5.0×10⁻¹ rad/sec
10 x 10¹ rad / sec
7.8 x 10⁻² rad / sec

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