The velocity of a bullet is reduced by \( 200 \mathrm{~m} / \mathrm...

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The velocity of a bullet is reduced by \( 200 \mathrm{~m} / \mathrm{s} \) while
P travelling through a wooden block in \( 10 \mathrm{sec} \). The retardation, assuming it to be uniform, will be:
W
(1) \( 10 \mathrm{~m} / \mathrm{s}^{2} \)
(2) \( 12 \mathrm{~m} / \mathrm{s}^{2} \)
(3) \( 20 \mathrm{~m} / \mathrm{s}^{2} \)
(4) \( 15 \mathrm{~m} / \mathrm{s}^{2} \)
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