ECZ 2020 · O-Level Paper 1 — Travel Graphs
The diagram is the speed-time graph of a moving object which decelerates uniformly at 8 m/s² from a speed of 52 m/sto v m/sin 6 seconds. It then moves at constant speed for 10 seconds and finally decelerates uniformly to rest in 4 seconds. Calculate (a) the speed v.
- A. 4 m/s
- B. 48 m/s
- C. 44 m/s
- D. 8 m/s
Verified working — step 1
The speed drops by (deceleration × time) = 8 × 6 = 48 m/s. So v = 52 - 48 = …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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