The displacement of a particle starting from rest \( \mathrm{P} \) ...

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The displacement of a particle starting from rest
\( \mathrm{P} \) (at \( t=0 \) ) is given by \( s=6 t^{2}-t^{3} \)

W The time when the particle will attain zero velocity again, is:
(1) \( 4 \mathrm{~s} \)
(2) \( 8 s \)
(3) \( 12 \mathrm{~s} \)
(4) \( 16 \mathrm{~s} \)
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