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The Earth rotates with an angular velocity of $\omega$.

My questions:

  1. Is the angular acceleration of the Earth equal to $0$ because angular velocity is stable?
  2. What is the difference between angular acceleration and the acceleration of the Earth's gravity?
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  1. Yes there is no angular acceleration.(except a very little by the tides)
  2. The attraction between masses which causes the gravitation, has nothing to do with the rotation, The exact force on a mass on earth ist a little diminished by centrifugal force
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