What is the effect of earth's rotation on the gravity (g)?

Question

What effects, the rotation of earth puts on the gravity (g)? What if earth stops spinning?

Answer 1

garavity and spining force are opposite directions. spinning force does not really considered. it is very small so you can ignore it. Or go to poles and feel just the gravity. there is no spinning force in poles. the difference is 9.8  and 10