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Two blocks of mass 4 kg and 2 kg are con...

Two blocks of mass 4 kg and 2 kg are connected by a heavy string and placed on rough horizontal plane. The 2 kg block is pulled with a constant force F. The coefficient of friction between the blocks and the ground is 0.5. What is the value of F so that tension in the string is constant throughout during the motion of the blocks ? `(g=10 m//s^(2))`

A

40 N

B

30 N

C

50 N

D

60 N

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The correct Answer is:
B
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