block tied between two springs is in equilibrium. If upper spring is cut then the acceleration o...

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block tied between two springs is in equilibrium. If upper spring is cut then the acceleration of the block just after cut is 6 \( \mathrm{m} / \mathrm{s}^{2} \) downwards. Now, if instead of upper spring, lower spring is cut then the magnitude of acceleration of the block just after the cut will be : (Take \( g=10 \mathrm{~m} / \mathrm{s}^{2} \) )
(a) \( 16 \mathrm{~m} / \mathrm{s}^{2} \)
(b) \( 4 \mathrm{~m} / \mathrm{s}^{2} \)
(c) Cannot be determined
(d) None of these
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