ECZ 2019 · GCE Paper 1 — Travel Graphs

In the same journey (rest → 10 m/s in 2 s; constant for 6 s; accelerating from 8 s to 13 s up to V m/s; then retarding to rest over the last 8 seconds), find the value of V if the retardation in the last 8 seconds is 3 m/s².

Verified working — step 1

Work the last stage BACKWARDS: it ends at rest, losing 3 m/s every second for 8 seconds - so it must have started with all that speed.

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Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.

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