Question

Who can answer this....

Answer 1

Answer is (B)12 m/s.. l hope it will help you.

Answer 2

X=8+12t-t^3
Where 'x' is distance travelled 't' is time taken
dx/dt=velocity
dx/dt=d(8+12t-t^3)/dt
= 0+12-3t^2
When velocity becomes zero
dx/dt=0
12-3t^2=0
3t^2=12
t^2=4
t=2 sec
Acceleration =dv/dt
Sub t=2 in v
12-3×4=0
V/t=0/2=0 ms^-2