A block mass `m = 2 kg` is moving with velocity`v_(0)` towards a mass less unstretched spring of the force constant `k = 10 N//m`. Coefficient of friction between the block and the ground is `mu = 0.2`. Find the maximum value of `v_(0)` so that after pressing the spring the block does not return back but stops there permanently.
A. `sqrt(12) m//s`
B. `sqrt(4.2) m//s`
C. `sqrt(10) m//s`
D. `sqrt(6.4) m//s`
