A \( 20 \mathrm{~kg} \) block placed on a level frictionless surface is attached to a cord which...

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A \( 20 \mathrm{~kg} \) block placed on a level frictionless surface is attached to a cord which passes over two small frictionless pulleys, as shown in figure-2.167, to a hanging block originally, at rest \( 1 \mathrm{~m} \) above the floor. If the hanging block strikes the floor \( 2 \mathrm{~s} \) after the system is released, the weight of the hanging block is :
Figure \( 2.167 \)
(A) \( 3.5 \mathrm{~N} \)
(B) \( 5.27 \mathrm{~N} \)
(C) \( 5.4 \mathrm{~N} \)
(D) \( 10.54 \mathrm{~N} \)
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