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Rolling Friction -- Happy and Unhappy Balls M-k2b
Race the happy and unhappy balls down an inclined plane Fishbane Chapter:   5.2 HRW 9th:   11.04 Reese Chapter:   5.912 RHK 5th:   5.3 SJ 3rd Chapter:   5.1 PIRA DCS classification:   1K20.101

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Physics Lecture Demonstrations at the Department of Physics and Astronomy
The Johns Hopkins University