ECZ 2011 · O-Level Paper 1 — Travel Graphs
The speed-time graph shows a lorry which starts from rest and increases speed at a constant rate for 6 seconds, reaching V1 m/s. If the lorry travelled 120 m in the first 6 seconds, calculate the value of V1.
- A. 30
- B. 20
- C. 60
- D. 40
Verified working — step 1
Distance in the first 6 seconds is the area of a triangle: (12) x 6 x V1 = 120, so 3V1 = 120 and V1 = …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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