(a(i))[1]
State the car's speed at $t = 0\,\text{s}$.
(a(ii))[1]
Suggest why the car continues to travel at this speed for $0.9\,\text{s}$.
(b(i))[2]
Calculate the deceleration of the car between $t = 0.9\,\text{s}$ and $t = 4.0\,\text{s}$.
(b(ii))[3]
Calculate the total distance travelled by the car from $t = 0\,\text{s}$.
(c)[2]
Describe and explain a danger to a driver of not wearing a safety belt during a sudden stop.