Question

The displacement of a particle starting from rest
(at t = 0) is given by s = 6t² – t³. The time in
seconds at which the particle will attain zero
velocity again, is :
(a) 2 (b) 4
(c) 6 (d) 8

Answer 1

Answer:

b

Explanation:

we can get velocity by distance and time

Answer 2

Given,

x=6t²-t³

velocity =dx/dt

dx/dt=12t -3t²

so particle will attain velocity =0

=| V=12t-3t²

=| put V=0

we get,

=| 3t(4-t)=0

we get t=0 and t=4 sec

so t= 0 particle starts and again attains zero velocity at t=4sec .

hope it will help you

Plsssssssssssss mark it as Brainliest