Is gravity greater at the poles or equator and difference in gravitational acceleration at poles and at equator?
Lyudmil Antonov
Gravity is greater at the poles than at the equator for two reasons:
- The centrifugal force cancels out the gravitational force minimally, more so at the equator than at the poles.
- The poles are closer to the center due to the equatorial bulge, and thus have a stronger gravitational field.
The difference of 0.0178 m/s^2 between the gravitational acceleration at the poles and the true gravitational acceleration at the Equator is because objects located on the Equator are about 21 km (13 mi) further away from the center of mass of the Earth than at the poles, which corresponds to a smaller gravitational acceleration at the Equator.
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