A light spring of length \( 20 \mathrm{~cm} \) and force constant \...

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A light spring of length \( 20 \mathrm{~cm} \) and force constant \( 2 \mathrm{~kg} \) / \( \mathrm{cm} \) is placed vertically on a table. A small block of mass \( 1 \mathrm{~kg} \) falls on it. The length \( \mathrm{h} \) from the surface of
\( P \) the table at which the ball will have the maximum velocity is -
(1) \( 20 \mathrm{~cm} \)
(2) \( 15 \mathrm{~cm} \)
(3) \( 10 \mathrm{~cm} \)
(4) \( 5 \mathrm{~cm} \)
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