A bullet moving with a velocity of \( 200 \mathrm{~cm} / \mathrm{s}...

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A bullet moving with a velocity of \( 200 \mathrm{~cm} / \mathrm{s} \) penetrates a wooden block and comes to rest after
\( \mathrm{P} \) travelling \( 4 \mathrm{~cm} \) inside it. What velocity is needed for
\( \mathrm{W} \) travelling distance of \( 9 \mathrm{~cm} \) in same block?
\( \theta \)
(1) \( 100 \mathrm{~cm} / \mathrm{s} \)
(2) \( 136.2 \mathrm{~cm} / \mathrm{s} \)
(4) \( 250 \mathrm{~cm} / \mathrm{s} \)
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