Question

A particle moves along the x axis and its displacement at any time is given by x(t)=t^3-3t^2+4t is SI units. What is the velocity of the particle when the acceleration is zero ?

Answer 1

when acceleration is zero the velocity remain
s constant

Answer 2

v can be given by single diff
and a can be given by double diff
implies v=3t^2-6t+4
            a=6t-6=0
implies t=1
v=3-6+4
v=1m/s