ECZ 2017 · GCE Paper 1 — Travel Graphs
The speed-time graph shows a 100 m sprinter who accelerates uniformly for 3 seconds until he reaches a speed of 12 m/s, maintains the speed for 7 seconds, then uniformly retards for a further 4 seconds and comes to a stop. Calculate the acceleration during the first 3 seconds.
- A. 3 m/s²
- B. 12 m/s²
- C. 4 m/s²
- D. 36 m/s²
Verified working — step 1
Acceleration = change in speed ÷ time = 12 − 03= …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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