O-LevelMathematicsAlgebra and graphs4024/11 · Oct/Nov 2015 · Q204 Marks
The diagram shows the first 15 seconds of a car's journey. The car starts from rest. The acceleration of the car from t = 0 to t = 5 is 4m/s². The acceleration of the car from t = 5 to t = 15 is 2 m/s². [Figure: Speed-time graph, with points at (0,0), (5, Speed), (15, Speed').]
- (a)(i)Find the speed of the car when t = 5,[1]
- (a)(ii)Find the speed of the car when t = 15.[1]
- (b)Find the distance travelled by the car between t = 5 and t = 15.[2]
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Mark scheme
Marking points from the official mark scheme (Oct/Nov 2015). The mark or mark type is shown in brackets.
- [1] (a) (i) 20
- [1] (a) (ii) 40
- [2] (b) 300 WWW; or FT 5 × {their(i) + their (ii)}
- [2] M1 for 1/2 × (their 20 + their 40) × 10 oe
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