A student carries out an experiment to investigate the relationship between the drop height and the final velocity of a small steel sphere falling vertically from rest. The student uses a handheld stopwatch to measure the time of fall and a standard metre ruler to measure the drop height.
Give two ways that the student can improve the quality of their data to obtain a more accurate determination of the sphere's acceleration, other than ignoring anomalous results.
53 exam-style questions on Edexcel GCSE Physics 2.2 Speed, velocity and acceleration. Each one has a worked solution and a mark scheme showing where the marks go.