Question

How does the earth spinning affect gravity?

Answer 1

the earth spinning on its axis relates to circular motion, hence causing a centrifugal force is a factor to be kept in mind.

so, imagine my finger is tied to a rope tied to a ball...
the rope has gravity instead of tension
my finger is the axis and the entire system represents earth.

now if i stop spinning the ball, the rope would definitely not function right?

so now think of it, if the earth stops spinning, gravity would not be present anymore.

the faster the earth spins, the higher the acceleration due to gravity!

hope that helped you! :-)