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Q.

Three equal weights of mass 2 kg each are hanging on a string passing over a fixed pulley as shown in Figure. What is the tension in the string connecting weights B and C ?

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a

zero

b

13 N

c

3.3 N

d

19.6 N

answer is B.

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Detailed Solution

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Acceleration, a=2g+2g−2g2+2+2=g3; for' C′,2g−Tc=2g3
⇒ Tc=4g3

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