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The displacement of a particle is represented by the
\( \mathrm{P} \) following equation : \( s=3 t^{3}+7 t^{2}+5 t+8 \) where \( s \) is in metre and \( t \) in
W second. The acceleration of the particle at \( t=1 \) is:
(1) \( 14 \mathrm{~m} / \mathrm{s}^{2} \)
(2) \( 18 \mathrm{~m} / \mathrm{s}^{2} \)
(3) \( 32 \mathrm{~m} / \mathrm{s}^{2} \)
(4) Zero
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