What will be the displacement of a block in first \( 0.2 \mathrm{~s} \) if the block is kept on ...

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What will be the displacement of a block in first \( 0.2 \mathrm{~s} \) if the block is kept on the floor of an elevator at rest. Suddenly elevator starts descending with an acceleration of \( 13 \mathrm{~m} / \mathrm{s}^{2} \). Take \( g=10 \mathrm{~m} / \mathrm{s}^{2} \).
(a) \( 26 \mathrm{~cm} \)
(b) \( 6 \mathrm{~cm} \)
(c) \( 46 \mathrm{~cm} \)
(d) \( 20 \mathrm{~cm} \)
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