(a(i))[2]
From Fig. 1.1, determine the speed of the lorry at time $t = 30\,\text{s}$.
(a(ii))[2]
From Fig. 1.1, determine the lorry’s average speed between $t = 60\,\text{s}$ and $t = 120\,\text{s}$.
(b(i))[1]
From Fig. 1.1, determine the magnitude of the lorry’s acceleration at time $t = 30\,\text{s}$.
(b(ii))[1]
Determine the lorry’s forward force from its engine at time $t = 30\,\text{s}$.
(c)[2]
Describe the lorry’s motion from time $t = 60\,\text{s}$ to time $t = 130\,\text{s}$.