ECZ 2024 · GCE Paper 1 — Travel Graphs
The diagram below shows the speed-time graph of an object. The object accelerates uniformly from O to P until it reaches a speed of 20 m/s in 4 seconds and then moves steadily from P to Q for 6 seconds and finally comes to rest. Find the average speed in the last 4 seconds.
- A. 4 m/s
- B. 10 m/s
- C. 8 m/s
- D. 16 m/s
Verified working — step 1
Read the interval carefully first: the motion ends at 15 s, so "the last 4 seconds" run from 11 s to 15 s - inside the slowing-down stage.The full step-by-step working and final answer are included with Premium — checked against ECZ marking standards.
Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.
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