>>10781506It does, but typically the rotation of the planet is not fast enough for it to play a significant role. On Earth a rock that weighs 1kg at the poles will weigh just a little less than 1kg at the equator.
If you were to continuously speed up the rotation of the Earth the centrifugal force would start having greater influence and the planet would become less and less spherical until it gravity can no longer hold it together and it is ripped to pieces.
Pic and link related.
https://en.wikipedia.org/wiki/Haumea 