A student uses constant-acceleration formulae to predict the motion of a trolley. The model predicts that the trolley will be 2.40 m from its starting point after 2.00 s. In an experiment, the measured displacement is 2.18 m.
Calculate the percentage by which the model overestimates the measured displacement.
State one modelling assumption that could explain the difference.
Explain how repeated measurements could be used to judge whether the model should be refined.