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, covering 2.2.1 Speed and distance–time graphs, 2.2.2 Acceleration and the uniform-acceleration equation, 2.2.3 Velocity–time graphs, and 2.2.4 Measuring speed, typical speeds and free-fall acceleration. Each one has a worked solution and a mark scheme showing where the marks go.