Chain+Physics+Momentum

https://www.youtube.com/watch?v=-eEi7fO0_O0 https://www.youtube.com/watch?v=_dQJBBklpQQ

http://www.wired.com/2013/07/the-physics-of-that-gravity-defying-chain-of-metal-beads/ http://www.physics.princeton.edu/~mcdonald/examples/chain.pdf https://medium.com/@shbl_/anti-gravity-bead-chain-experiment-physics-behind-it-860a2114806#.qvy4rv3fo