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2D Conservation of Momentum using Air Hockey Discs and Unit Vectors (5:08)

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Lecture Notes
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AP Physics C
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A 28.8 g yellow air hockey disc elastically strikes a 26.9 g stationary red air hockey disc. If the velocity of the yellow disc before the collision is 33.6 i cm/s and after the collision it is [4.79 i - 9.57 j] cm/s, what is the velocity of the red disc after the collision? This is an AP Physics C: Mechanics topic.

Content Times:
0:00 The Demonstration
1:43 Unit Vector Solution
4:33 Non-Unit Vector Solution
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  • Thank you to John Paul Nichols, Julie Langenbruner, Kavya Ramanavar, and Scott Carter being for being my Quality Control Team for this video.
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