Weight dependent on planet size and rotation speed?

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SUMMARY

The discussion centers on the relationship between a planet's size, rotation speed, and the weight of objects on its surface. It is established that surface gravity is influenced by mass, density, and rotation rate. The centripetal force equation is crucial in understanding how rotation can counteract gravitational pull, potentially allowing for similar weights on larger, faster-rotating planets compared to Earth. A link to the centripetal force equation is provided for further exploration.

PREREQUISITES
  • Understanding of surface gravity concepts
  • Familiarity with centripetal force equations
  • Basic knowledge of planetary mass and density
  • Awareness of rotational dynamics
NEXT STEPS
  • Research the centripetal force equation in detail
  • Explore the effects of planetary rotation on gravity
  • Study the relationship between mass, density, and gravitational force
  • Investigate examples of exoplanets with varying sizes and rotation speeds
USEFUL FOR

Astronomers, physicists, science fiction writers, and educators interested in planetary science and gravitational effects.

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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