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/s2, cos60° = 0.5)
A. 7.8 × 10-2 rad/s
B. 0.5 × 10-3 radis
C. 1 × 10-3 radis
D. 2.5 × 10-3 rad/s
Answer:D
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/s2, cos60° = 0.5)
A. 7.8 × 10-2 rad/s B. 0.5 × 10-3 radis C. 1 × 10-3 radis D. 2.5 × 10-3 rad/s