(a)[3]
Fig. 1.1 shows a speed-time graph for the opening 5 minutes of a bus journey. Describe the motion during: 1. $t = 0.90\,\text{min}$ to $t = 2.9\,\text{min}$ 2. $t = 2.9\,\text{min}$ to $t = 3.5\,\text{min}$ 3. $t = 3.5\,\text{min}$ to $t = 4.5\,\text{min}$.
(b(i))[2]
Calculate the kinetic energy of the bus before the brakes start to act.
(b(ii))[3]
Calculate the force needed to bring the bus to rest.