Arm Swinging - Physical Model

Video of the Physical Model Demonstration: We verified our mathematical model using simple, passive, artificial arms made of rope or wood, and found similar modes of passive dynamic arm swinging as in the model, including: Normal arm swinging with artificial arms made of rope (left) or wood (second from left); Anti-Normal arm swinging (second from right); and Parallel arm swinging (right), among others. When taken in combination with our computer simulations, these models strongly suggest passive dynamics play a large role in generating the swinging motion of the arms. See attached article for details. Videos by Steve Collins and Peter Adamczyk (shown). Download: AVI (1 MB).