5 Figure 1.2.16 shows an incomplete speed-time
graph for a boy running a distance of 100 m.
a Calculate his acceleration during the first
4 seconds.
[2]
b
Calculate how far the boy travels during
i the first 4 seconds
ii the next 9 seconds?
c Copy and complete the graph, showing
clearly at what time he has covered the
distance of 100 m. Assume his speed
remains constant at the value shown by
the horizontal portion of the graph.
speed/m/