A block of mass m is connected to a spri...

A block of mass `m` is connected to a spring of spring constant k as shown in figure. The frame in which the block is placed is given an acceleration a towards left. Neglect friction between the block and the frame walls. The maximum velocity of the block relative to the frame is

`(F)/(sqrt(mL))`

`(F)/(2sqrt(mK))`

`(F)/(sqrt(2mK))`

`(2F)/(sqrt(mK))`

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