Rotation Rotation of a planet is dependent on many factors, only one of which is the initial motion attained coming out of a big bang. Take the instance of your Earth, during the passage of her brother, the 12th Planet.
Rotation slows and then stops, for days, and then after passage resumes to the same pace as before.
This is because of the other factors involved in rotation, which remain in place in your Solar System and have their grip on the Earth. Rotation is due to a mobility difference between the core of a planet and the surface, and for lack of a better analogy we relate this to a dog chasing its tail. The core of the Earth is liquid, and mobile, and has a mind of its own. As the Earth moves in its orbit around the Sun, the relationship of the core of the Earth to surrounding influences changes. In like manner, the heavy Core of the Earth moves to face or escape magnetically related forces in the Universe about your Solar System, dragging the surface with it.