Swing time.
The graph below shows the motion of an
electric train between two stations.
Speed / m/s 12
10
8
6
4
2
0
0
10
20
Time/s
30
[2]
40
40 Describe the motion of the train between
0 and 20 s.

(b) Describe the motion of the train between
20 and 40 s.

(c) Calculate the total distance travelled by
the train in the first 40 s of motion.