(a)[2]
Express $45\text{ km/h}$ in m/s.
(b)[1]
Calculate the deceleration of the car, giving your answer in $\text{m/s}^2$.
(c)[3]
Calculate the distance covered by the car in the 30 seconds, giving your answer in metres.
Mathematics 0580 · IGCSE · Graphs in practical situations
Graphs in practical situations — practice question
The diagram depicts a car’s speed-time graph. The car moves at 45 km/h for 20 seconds. It then slows down over 10 seconds until it comes to rest. On the graph, speed (km/h) is shown on the vertical axis and time (seconds) on the horizontal axis, with 0, 10, 20, and 30 seconds marked. The diagram is marked NOT TO SCALE.