The displacement of a particle starting from rest (at t = 0) is given by $s=6{t}^{2}-{t}^{3}$. The time in seconds at which the particle will attain zero velocity again, is

(1) 2

(2) 4

(3) 6

(4) 8

Concept Videos :-

#13-Graphical-Meaning-of-Instantaneous
#14-Solved-Examples-7
#12-Instantaneous-Velocity

Concept Questions :-

Instantaneous speed and instantaneous velocity

(2) $v=\frac{ds}{dt}=12t-3{t}^{2}$

Velocity is zero for $t=0$ and $t=4\mathrm{sec}$

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