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Skateboarding Frame of Reference Demonstration (2:31)

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Algebra

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All motion is relative to a frame of reference.  A simple demonstration showing this to be true.

Content Times:
0:21 The demonstration
1:22 A second, similar demonstration

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Thank you very much to Chris Dupont for letting me use my recording of “Starting Fires” from his show at The Ark on 2013/11/14.

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