How would fast rotation affect gravity?

I have a planet which was created by a God, who is experimenting with it by making it spin at an incredible speed. At the equator, the gravity is reduced to half by the centrifugal force generated by spinning.

This God has been preventing collisions from meteors and the likes which would likely disrupt the experiment. The planet is made from a material which maintains its shape under these extreme conditions, so the planet remains spherical. The God places people on this planet. They can breathe, and have everything they need. This is an experiment, and the God doesn't care whether the people die or not.

My question is what the "gravity" will be like.

My question is not about atmosphere, whether the people survive, tectonics, the colour of the guy's T-Shirt, or any other details. This is a heartless God who is dropping humans onto this planet in an experiment, like how a child may drop insects into water to see what will happen.

The planet is earth-sized with 1G of gravity. The frequency of rotation is such that the centrifugal force reduces "gravity" to 1/2G at the equator. If you started at the equator, and moved towards the pole, what would the apparent "gravity" be like? I'm particularly interested in the strength of centrifugal force in proportion to gravity, their directions, and their resultant vector.

Note: Yes. I'm aware that centrifugal force isn't a real force.

posted about 7 years ago

Aric‭

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