(a)[2]
Convert $90\text{ km/h}$ into m/s.
(b)[1]
Find the car’s deceleration in $\text{m/s}^2$.
(c)[2]
Find the distance travelled, in metres, during the 60 seconds.
Mathematics 0580 · IGCSE · Graphs in practical situations
Graphs in practical situations — practice question
A speed-time graph, drawn not to scale, plots speed (km/h) against time (seconds) for the first 60 seconds of a car journey. From 0 to 40 seconds the car moves at $90\text{ km/h}$, and from then until 60 seconds it slows uniformly to $0$.