Pretty clever. My instinctual reaction was to say, well, no, it's trivial, of course not, it's a tiny length compared to the Earth's size. But mathematically,

Pretty clever. My instinctual reaction was to say, well, no, it's trivial, of course not, it's a tiny length compared to the Earth's size. But mathematically, well, c = 2πr, right? It's another 15cm or so on the radius, if it were perfectly rigid. In practice though it'd flop down (perpendicular to the plane of the circle) and if that were fairly well distributed I'd assume the 15cm wouldn't be noticeable, and friction+gravity would make it difficult to pull up?