(a)[2]
On the grid, sketch the speed-time graph for the car’s journey.
(b)[1]
Calculate the car’s acceleration in the first $20$ seconds of the journey.
Mathematics 4024 · O Level · Graphs in practical situations
Graphs in practical situations — practice question
A car sets off from rest. For the first $20$ seconds, it accelerates uniformly until its speed becomes $15\,\text{m s}^{-1}$. After that, it continues at a steady speed of $15\,\text{m s}^{-1}$ for $40$ seconds.