A block of mass `0.18 kg` is attached to a spring of force-constant `2 N//m`. The coefficient of friction between the block and the floor is `0.1` Initially the block is at rest and the spring is un-stretched. An impulse is given to the block as shown in the figure. The block slides a distance of `0.06 m` and comes to rest for the first time. The initial velocity of the block in m//s is `V = N//10`. Then `N` is :
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