In this question you must show detailed reasoning.
A student films a tennis ball dropped from rest through a vertical distance of 1.80 m. The measured time is 0.64 s. The student first models the ball as a particle moving freely under gravity with g=9.8 m s−2g=9.8\text{ m s}^{-2}g=9.8 m s−2.
Use the model to calculate the predicted time of fall.
Compare the prediction with the measured time.
Give two possible reasons for the difference.
Describe one practical refinement to the investigation that would help decide whether air resistance is significant.
260 exam-style questions on OCR A Level Maths 3.2 Kinematics, covering 3.2.1 Language of kinematics, 3.2.2 Graphs in kinematics, 3.2.3 Displacement-time and velocity-time graphs, 3.2.4 Constant acceleration formulae, 3.2.5 Constant acceleration in two dimensions (A-level only), 3.2.6 Non-uniform acceleration in one dimension (A-level only), 3.2.7 Non-uniform acceleration in two dimensions (A-level only), 3.2.8 Motion under gravity using vectors (A-level only), and 3.2.9 Projectiles (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.