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Stable and Unstable Equilibria M-j2a
Two large rings each with two masses that have radially adjustable positions. Stable, unstable, and neutral equilibrium can be shown. Fishbane Chapter:   11.1 HRW 9th:   12.02 RHK 5th:   9.4 SJ 3rd Chapter:   10.6 PIRA DCS classification:   1J20.051

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