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Integrated Science: Terminal VelocityExpedition 2:Relative Motion and Inertial Reference Frames Professor Dave (6:27)Frames of Reference Part 1 (8:38) (1960)Expedition 3:Newton's Law of University Gravitation (1:30): http://https://www.youtube.com/watch?v=Jk5E-CrE1zgB.N. - Motion video (28:33) B.N. - Motion video