System shown in figure-3.99 is released from rest. Pulley and spring is massless and friction is...

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System shown in figure-3.99 is released from rest. Pulley and spring is massless and friction is absent everywhere. The speed of \( 5 \mathrm{~kg} \) block when \( 2 \mathrm{~kg} \) block leaves the contact with ground is : (Take force constant of spring \( k=40 \mathrm{~N} / \mathrm{m} \) and \( g=10 \mathrm{~m} / \mathrm{s}^{2} \) )
(A) \( \sqrt{2} \mathrm{~m} / \mathrm{s} \)
(B) \( 2 \sqrt{2} \mathrm{~m} / \mathrm{s} \)
(C) \( 2 \mathrm{~m} / \mathrm{s} \)
(D) \( 4 \sqrt{2} \mathrm{~m} / \mathrm{s} \)
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