From where does earth get energy for rotation?

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    Earth Energy Rotation
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Discussion Overview

The discussion centers on the source of energy for Earth's rotation, exploring concepts related to motion, gravitational forces, and the principles of physics that govern rotational dynamics. Participants examine whether energy is required to maintain rotation and the implications of Newton's laws.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions the source of energy for Earth's rotation, suggesting a need for input against the sun's gravity.
  • Another participant asserts that no energy input is required for Earth's rotation, referencing Newton's first law and conservation of energy.
  • A later reply emphasizes that once an object is in motion, it does not require energy to maintain that motion, but rather energy is needed to stop it.
  • Participants mention that planets, once they begin rotating, do not need additional energy to continue rotating.

Areas of Agreement / Disagreement

There is disagreement regarding the need for energy input to maintain Earth's rotation, with some participants asserting that no energy is required while others question this assertion.

Contextual Notes

The discussion involves assumptions about the nature of rotational motion and the application of Newton's laws, which may not be fully explored or agreed upon by all participants.

joyever
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from where does Earth get energy for rotation?as its rotating means its doing some motion to work again sun's gravity soo from where does Earth gets this energy?
 
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No, the Earth is not doing work against the sun, so no input is required.
 
but anyhow how Earth gets energy for rotation?
 
Like I said, no energy input is required. That is due to Newton's first law and conservation of energy.
 
google... "why do planets rotate"

And once they "start" they don't need energy, as Russ explained.
 
Once something is rotating, it doesn't need energy to keep on rotating. In fact, it needs energy to STOP it from rotating.
 

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