A car begins from rest at time $t = 0$ and then reaches its highest speed. Fig. 1.1 shows the speed-time graph for the first $25\,\text{s}$ of the motion.
(a(i))[2]
Determine the acceleration of the car during this interval.
(a(ii))[2]
Determine the resultant force acting on the car in this interval.
(b)[3]
Describe the motion of the car between $t = 10\,\text{s}$ and $t = 15\,\text{s}$. Explain how Fig. 1.1 indicates this.
(c)[2]
Suggest and explain why the car travels in the pattern illustrated by Fig. 1.1.
Worked solution & mark scheme
This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: “a = \Delta v / \Delta t or a = (v - u) / t or the gradient” …