In order to make the effective acceleration due to gravity equal to zero at the equator, the angular velocity of rotation of the earth about its axis should be \[(g=10\,m{{s}^{-2}}\] and radius of earth is 6400 kms) [Roorkee 2000]

• A.             \[0\,\ rad\,{{\sec }^{-1}}\]
• B.                      \[\frac{1}{800}rad\,se{{c}^{-1}}\]
• C.             \[\frac{1}{80}rad\,se{{c}^{-1}}\]
• D.                      \[\frac{1}{8}rad\,se{{c}^{-1}}\]