ECZ 2022 · O-Level Paper 1 — Travel Graphs

The diagram below is the speed-time graph of an object. The object starts from rest and accelerates uniformly for 2 seconds until it reaches a speed of 10m/s. It then travels at this speed for 8 seconds and finally decelerates to rest after 5 seconds. Find the (c) average speed of the object for the whole journey.

Verified working — step 1

Total distance = area under the graph.

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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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