2. What radius of the central sheave is necessary to make the o 60 mm fall time exactly 4 s, if the same pendulum with
2. What radius of the central sheave is necessary to make the o 60 mm fall time exactly 4 s, if the same pendulum with weights at R=140 mm is used? o 10.78 mm . 8.065 mm o 436.341 mm . 20.889 mm o 272.594 mm
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