From where does earth get energy for rotation?

1. Aug 9, 2011

joyever

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?

2. Aug 9, 2011

Staff: Mentor

No, the earth is not doing work against the sun, so no input is required.

3. Aug 9, 2011

joyever

but anyhow how earth gets energy for rotation?

4. Aug 9, 2011

Staff: Mentor

Like I said, no energy input is required. That is due to Newton's first law and conservation of energy.

5. Aug 9, 2011