ECZ 2012 · O-Level Paper 1 — Travel Graphs
The car starts from the same place as the van but 4 seconds later, and accelerates uniformly until it overtakes the van. Given that overtaking occurs when the van has been travelling for 20 seconds, calculate the speed of the car at this instant.
- A. 6 m/s
- B. 9.6 m/s
- C. 24 m/s
- D. 12 m/s
Verified working — step 1
At the overtake the car has matched the van's 96 m - but in only 16 seconds, from rest, so its graph is a triangle ending at speed v.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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