Physics 5054 · O Level · Motion

Motion — practice question

Fig. 1.1 is a distance-time graph showing cyclists A and B. They set off together in a 500 m race, but they cross the finish line at different times.
(a(i))[1]

From Fig. 1.1, find the distance separating A and B when $t = 20\,\text{s}$.

(a(ii))[1]

From Fig. 1.1, work out how much longer A and B took to complete the race.

(b(i))[2]

Cyclist C starts at the same moment as A and B and travels the first 200 m of the race at a steady speed of $5.0\,\text{m s}^{-1}$. He then speeds up and completes the race at $t = 60\,\text{s}$. On Fig. 1.1, sketch the distance-time graph for cyclist C.

(b(ii))[2]

Calculate the average speed of cyclist C over the entire race.

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