Three equal weights each of mass \( 4 \mathrm{~kg} \) are hanging o...

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Three equal weights each of mass \( 4 \mathrm{~kg} \) are hanging on a string passing over a fixed pulley as shown in fig. What is the tension in the string connecting weights B and C.?
(1) Zero
(2) \( 13.3 \mathrm{~N} \)
(3) \( 26.6 \mathrm{~N} \)
(4) \( 19.6 \mathrm{~N} \)
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