Answer:
Choice d
0 acceleration and velocity of 6 m/s
Step-by-step explanation:
The smart way to tackle questions like these is by POE or Process of Elimination.
We can easily eliminate choices a, b and c since velocity is definitely not 0
So choice (d)
If we look at the graph we see that between 6s and 8s the graph is flat at a velocity value of 6 m/s. So the answer should be velocity of 6 m/s and since there is no increase in velocity, the acceleration is also 0
However, this can also be proved mathematically
Acceleration = change in velocity/change in time
= Δv/Δt
Δv = 6 - 6 = 0
The velocity is 6 m/s at 8 seconds and also 6 m/s at 6 seconds
Δt = 8 - 6 =2
Acceleration = 0/2 = 0 m/s²
Hence choice d