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Question

Calculate angular velocity of earth so that acceleration due to gravity at 60o latitude becomes zero. (Radius of earth =6400km, gravitational acceleration at poles=10m/s2,cos60o=0.5)

A
7.8×102rad/s
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B
0.5×103rad/s
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C
1×103rad/s
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D
2.5×103rad/s
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