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) 

(a) 2.5 ×10^–3 rad/sec 

(b) 5.0×10^–1 rad/sec 

(c) 10 x 10^-1 rad /sec 

(d) 7.8 x 10^-2 rad / sec 

Answer 1

Correct option (a) 2.5 ×10^–3 rad/sec 

Explanation:

Effective acceleration due to gravity due to rotation of earth