Describe a falling-object experiment to determine g. Identify apparatus, exact distance endpoints, timing events, repeated readings, controls, graph axes, processing, one systematic error with a check, and a safety precaution. A graph of h against t² has gradient 4.86 m s⁻²; calculate g.

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Use an electronically released ball and contact timer; measure bottom-of-ball to contact surface; repeat times over varied heights; plot h against t² and double its gradient. g=9.72 m s⁻². Check release/trigger delay and secure/catch the ball safely. Specify magnet/release start, ball, timer/contact stop, rule, secure stand and catcher. Measure the actual fall h between ball-bottom and trigger level. Repeat timing at a range of h with same ball and vertical release from rest. Plot h against t²; explain slope=g/2, giving g=9.72 m s⁻². Check zero/trigger/release offsets and discuss why repeats alone do not remove them. Quantify timing/height or gradient uncertainty; avoid reaction timing. State a relevant falling-object precaution.

Plan a falling-body measurement

Describe a falling-object experiment to determine g. Identify apparatus, exact distance endpoints, timing events, repeated readings, controls, graph axes, processing, one systematic error with a check, and a safety precaution. A graph of h against t² has gradient 4.86 m s⁻²; calculate g.

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