Free lunch for a lucky student

Watch this video: http://www.youtube.com/watch?v=eCMmmEEyOO0.

Write out a physical explanation, math and all, of why the slinky does as it does, convince me you understand your solution, and I’ll buy you lunch.

Open to students in MEC723 and MEC325 only, between now and 2 Dec 2011.

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