O-LevelMathematicsAlgebra and graphs4024/12 · May/June 2019 · Q93 Marks
A car starts a journey from rest. It moves with constant acceleration for 20 seconds until it reaches a speed of 15 m/s. It then moves at a constant speed of 15 m/s for 40 seconds.
- (a)On the grid, draw the speed-time graph for the car's journey.[2]
- (b)Calculate the acceleration of the car in the first 20 seconds of the journey.[1]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (May/June 2019). The mark or mark type is shown in brackets.
- [2] (a) Correct graph
- [B1] for ruled line from (0, 0) to (20, 15)
- [B1] for ruled line from (their 20, 15) to (their 20+ 40, 15)
- [1] (b) 0.75 oe
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