Did you know an object in motion stays in motion unless acted upon by an outside force? Unless some wind picks up, there's nothing there to act upon the stones. The rocks are traveling at the same speed as the Earth seeing as they are located on Earth. The still air around the rocks is traveling at the same speed as the Earth because the atmosphere follows the rotation. I can make the argument against the "universal acceleration theory" that a person should die if they ever jump into the air. The "theory" posits that the Earth is accelerating forward at a constant rate of 9m/s^2 to simulate gravity. As soon as you jump into the air, the excessive acceleration would completely annihilate your body in the split second the Earth catches up to you. Also, objects would fall at a rate of 9m/s^2. They do not. There's this little thing called "terminal velocity" which cannot physically exist under universal acceleration.