1.

The tension in the string connected between block is

Answer»

Let tension between the blocks is T
here you can see F_1>F_2 hence , net force acts in right direction.

for block of mass 2 KG,
T-F_2=<klux>2A</klux>
T - 10 = 2a.........(1)

for block of mass 4kg,
F_1-T=4a
20 - T = 4a.......(2)

solve equations (1) and (2),
10 = 6a => a = 5/3 m/s²

so,from equation (1), T = 10 + 10/3 = 40/3 N

hence, option (B) is correct.


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