Bucket experiment. What happens to water in a bucket if the bucket is rotated? Does the rotation of the bucket have to be "real" or will rotating the surrounding masses produce the same result? Conditions: A: Inner object rotated by steering jets (not shown) and flags pop out. B: Only outer ring rotated, and its flags pop out. C: Both are rotated but in opposite directions. Flags pop out accordingly. D: Objects are locked together and rotated. All flags pop out accordingly.
Own work
Patrick Edwin Moran