Question

)
D
A particle moves along a straight line such that its
displacement at any time t is given by
s=3t+6t+ 3t+5
The velocity, when its acceleration is zero, is
(a) 3 ms-
(b) -12 ms-
(c) 42 ms -1
(d) -9 ms​

Answer 1

Answer:

I think answer is option b i think

Answer 2

the answer is -12 ms-