IF EARTH WERE TO ROTATE FASTER THAN ITS PRESENT SPEED THEN WEIGHT PF OBJECT WILL DECREASE AT EQUATOR BUT REMAIN UNCHANGED AT POLES why?
centripetal acceleration
Ac = R omega^2
R = earth radius at equator
but
R = 0 at poles
rotation of earth tries to throw you off into space but gravity holds you on earth.
g = 9.81 - R omega^2