2025 CGS PRELIMS P1 Q24

2025 CGS PRELIMS P1 Q24

Secondary 4
5 marks

The diagram shows a speed-time graph of an object during a period of 30 seconds.

  1. Calculate the acceleration of the object when \(t=4\).[1]
  2. Calculate the distance travelled in the first 15 seconds.[2]
  3. Given that the acceleration of the object after \(t=22\) is \(1.5\text{ m/s}^2\), calculate the speed of the object when \(t=30\).[2]

Solution:

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Answer:(a) \(\frac73\text{ m/s}^2\) (b) \(228\text{ m}\) (c) \(30\text{ m/s}\)

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