What’s Up With That: How a Swinging Pendulum Proves the Earth Rotates

Once upon a time, you were probably on an elementary school field trip at a science museum or an observatory. Just before lunch, your teacher had the class stand in a circle around an enormous weight suspended on a string, and watch it swing back and forth, back and forth.

















from WIRED » Science http://feeds.wired.com/c/35185/f/661470/s/3adda1ad/sc/38/l/0L0Swired0N0C20A140C0A50Cwuwt0Efoucaults0Ependulum0C/story01.htm

via Science News