Whether you know it as Newton's Cradle or the Executive Ball Clicker, chances are you've seen the educational desk toy that seems to defy explanation. The device consists of a row of five metal balls suspended by wires.
via LiveScience.com http://www.livescience.com/39271-how-does-newtons-cradle-work.html
via LiveScience.com http://www.livescience.com/39271-how-does-newtons-cradle-work.html
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