Marble roller acceleration demo

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These marble rollers are meant to be used as a learning demonstration for acceleration due to gravity. There are 4 individual tracks, each with a specific profile.  20 degrees linear track, 30 degrees linear track, 30 degrees constantly curving, and 60 degrees constantly curving.  The tracks are each between 5 to 10 grams. Meaning printing cost is approximately 10 to 25 cents per track. 

About the author:
somerset
3D printing things for fun and utility :) I have more parts on my Thingiverse page, check that out at https://www.thingiverse.com/somerschrock/favorites

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