1. Answer the following questions: (1+2+1) (a) State what is meant by a vector quantity and give one example.
(b) Fig. 1.1 shows a toy locomotive on a circular track of radius 0.60 m

At time t = 0, the locomotive is at point A. The locomotive travels at a constant speed round the track.
It takes 20 s to travel completely round the track.
(i) Calculate the speed of the locomotive.
(ii) Fig. below shows the variation of the magnitude of the displacement s of the locomotive from A with
time t