System shown in figure is released from ...

System shown in figure is released from rest . Pulley and spring is mass less and friction is absent everywhere. The speed of `5 kg` block when `2 kg` block leaves the constant of with ground is (force constant of spring `k = 40 N//m and g = 10 m//s^(2))`

`sqrt(2)m//s`

`2sqrt(2)m//s`

`2m//s`

`4sqrt(2)m//s`

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