O-LevelMathematicsAlgebra and graphs4024/11 · Oct/Nov 2017 · Q224 Marks
The diagram is the speed-time graph of a train which travels between two stations. [Figure 22]
- (a)Find an expression, in terms of v, for the retardation of the train.[1]
- (b)The distance between the two stations is 1.2km. Find v.[3]
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Mark scheme
Marking points from the official mark scheme (Oct/Nov 2017). The mark or mark type is shown in brackets.
- [1] v/10 oe
- [3] M1 for 1/2 × (40+80) × v oe
- [B1] for two of 15v, 40v, 5v.
- [M1] for their 60v = their(1200)
- [3] 20 nfww
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