15 The graph shows how the speed of a cyclist varies during a timed section of length 120 metres along a straight track.
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15
- Find the acceleration of the cyclist during the first 10 seconds.
[0pt]
[1 mark]
15 - After the first 15 seconds, the cyclist travels at a constant speed of \(5 \mathrm {~m} \mathrm {~s} ^ { - 1 }\) for a further \(T\) seconds to complete the 120 -metre section.
Calculate the value of \(T\).
[0pt]
[4 marks]