The displacement of a particle, starting from rest P (at \( t=0) \)...

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

W
The time in seconds at which the particle will obtain zero velocity again is:
(1) 2
(2) 4
(3) 6
(4) 8
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