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The arrangement shown in the diagram is ...

The arrangement shown in the diagram is moving in a space with an acceleration `a = 4 (hati + hatj) ml s ^(2).` An ideal spring of natural length `l_(0)` having spring constant K = 50N/m, is connected to the block A. Blocks A and B are conected by an ideal string passing through a frictionless pulley. Mass of each block A and B is equal to m = 2kg. The minimum value of coefficient of friction so that spring remains in its natural length is 5/n where n is.

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