Weight dependent on planet size and rotation speed?

AI Thread Summary
Weight on a planet is influenced by its mass, density, and rotation speed. A larger planet with a faster rotation could theoretically result in a weight similar to that on Earth due to the effects of centripetal force. This force can counteract gravity, potentially flinging objects away if the rotation is sufficiently rapid. The centripetal force equation is key to understanding this relationship. Overall, both mass and rotation significantly impact perceived weight on different planets.
NHsolarguy
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Hi,
I recently read a sci-fi story where they implied that the planet was much larger than Earth, but because that planet was rotating much faster than Earth, a person's weight on this planet was similar to what it was on Earth. I always thought it was strictly the masses that controlled this... However, intuitively, if a body was rotating fast enough, I would think it would tend to fling away objects from the surface... So it certainly seems possible that rotation could affect weight. Does anyone have an equation handy for this?
thanks!
 
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