Three identical blocks of masses $m = 2\; kg$ are drawn by a force $F=10.2 N$ with an acceleration of $0.6\;ms^{-2}$ on a frictionless surface, then what is the tension (in $N$) in the string between the blocks B and C ? <br>

Question

https://clay6.com/mpaimg/1280_a.jpg

( A ) 4
( B ) 9.8
( C ) 9.2
( D ) 7.8