HTTP://WWW.PHYSICSCLASSROOM.COM/CLASS/CIRCLES/LESSON-3/NEWTON-S-LAW-OF-UNIVERSAL-GRAVITATION. GRAVITY THAT IS NORMAL AT THE EQUATOR WOULD CRUSH YOU AT THE POLES; THE CENTRIFUGAL FORCE GRAVITY WOULD NEED TO OVER COME AT THE EQUATOR WOULD BE NEARLY NON EXISTANT AT THE POLES