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Two blocks each having mass m is attache...

Two blocks each having mass m is attached to each other with a spring having force constant k. The system is placed on a rough horizontal surface having coefficient of friction `mu`. The maximum initial compression, that can be given to the spring so that when released the blocks do not move is

A

`2mu mg//k`

B

`mu mg//k`

C

zero

D

not possible

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The correct Answer is:
B
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