ECZ 2025 · GCE Paper 1 — Travel Graphs
The diagram below shows the speed graph of a particle. The particle starts from rest and accelerates uniformly to a speed of 10 m/s in 5 seconds. It then moved at this constant speed for 5 seconds and then accelerates at 2 m/s2 for 5 seconds to reach a speed of v m/s. Find the value of v.
- A. 12 m/s
- B. 20 m/s
- C. 10 m/s
- D. 25 m/s
Verified working — step 1
In the final stage the speed grows steadily: 2 m/s of extra speed for each of the 5 seconds, starting from 10 m/s.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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