ECZ 2023 · GCE Paper 1 — Travel Graphs
The following diagram is a speed-time graph of a car. The car starts from rest and accelerates uniformly at 3 m/s2 for 4 seconds until it reaches a speed of v m/s. It then travels at this constant speed for 8 seconds. It finally comes to rest after t seconds. Find the average speed for the first 12 seconds.
- A. 12 m/s
- B. 8 m/s
- C. 10 m/s
- D. 6 m/s
Verified working — step 1
Average speed = total distance ÷ total time, and on a speed-time graph the distance is the area under the first 12 seconds.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.
Have a different question?
Search it — if it is from a past paper or a school mock, chances are we have it worked out, or one that uses the same method.
Search any past-paper question