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Unofficial practice material A student investigates how the angle of a ramp affects the speed of a trolley. They set up a ramp and release a trolley from the same starting point each time. They measure the time it takes for the trolley to travel 1.0 m. Here are their results for one ramp angle: * Trial 1: 2.1 s * Trial 2: 1.9 s * Trial 3: 2.3 s (a) Calculate the average time for the trolley to travel 1.0 m at this ramp angle. Give your answer to two significant figures. (b) Using your average time from (a), calculate the average speed of the trolley over the 1.0 m distance. Show your working. (c) Describe two ways the student could improve the accuracy of their time measurements in this experiment, without using electronic sensors like light gates. [6 marks]

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