How fast is earth rotating?

well when the earth was being formed there would have been a spinning bit of rock which would have had enough gravity to attract more rocks which crashed into it and joined with it and then the gravity would have been stronger so more rocks would have come and some of those rocks would hit the spinning ball at such an angle that it caused the ball of rock to spin faster and because there was no friction or air resistance in space to stop it, the earth just kept on spinning.

Pheww!! that was a long sentence.