14 A toy train moves back and forwards along a straight displacement
section of track.
The displacement-time graph shows the motion of
the toy train.
(cm)
20
4
9
6
a
Calculate
i
The time spent stationary,
ii
The velocity during the first 3 seconds,
-18
iii The total distance travelled.
b
Find the average speed of the train during the final 6 seconds.
State the units of your answer.
11
15
time
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