ECZ 2024 · O-Level Paper 1 — Travel Graphs
The following diagram is a speed-time graph of a particle moving in a straight line. The particle decelerates uniformly from a speed of 35m/sto 20m/sin 10 seconds. It then moves at a constant speed of 20m/sfor 15 seconds before it decelerates uniformly to come to rest at the 40th second. Calculate the (a) retardation of the particle in the first 10 seconds.
- A. 1.5m/s2
- B. 2m/s2
- C. 15m/s2
- D. 3.5m/s2
Verified working — step 1
Retardation = decrease in speedtimeThe 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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