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Whirlybird M-q2a
Two equal masses with adjustable positions are mounted on a radial bar fixed to a horizontal axis with a pulley. A weight on a string rotates the assembly. Fishbane Chapter:   9.5 HRW 9th:   10.09 Reese Chapter:   10.8 RHK 5th:   9.6 SJ 3rd Chapter:   10.5 PIRA DCS classification:   1Q20.10

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