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An endless inextensible string of length 15 m passes around two pins, A and B which are 5 m apart. This string is always kept tight and a small ring, R, of negligible dimensions, inserted in this string is made to move in a path keeping all segments RA, AB, RB tight (as mentioned earlier). The ring traces a path, given by conic. C, then: |
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Answer» CONIC C is an ellipse with eccentricity `(1)/(2)` |
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