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please answer this in IGCSE curriculum thank you I'm in grade 9 1. The diagram shows a speed-time graph of a car. * 10 points

please answer this in IGCSE curriculum thank you I'm in grade 9

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1. The diagram shows a speed-time graph of a car. * 10 points Speed (m/s) 20 Time (s) 15 25 35 Given that the total distance travelled in the 35 seconds is 450 m, find (i) the acceleration of the car during the first 15 seconds, (ii) the deceleration of the car during the last 10 seconds, (iii) the average speed for the whole journey

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