A-LevelPhysicsPhysical quantities and units9702/12 · Oct/Nov 2020 · Q51 Mark

A steel ball is dropped and falls through a vertical height h. The time t taken to fall is measured using light gates. The results are given in the table. h (4.05 ± 0.01) m t (0.91 ± 0.02) s The acceleration of free fall g is calculated using the equation shown. h = 1/2 gt^2 What is the percentage uncertainty in the value of g?

A2.4%

B4.6%

C5.1%

D9.3%

✓ Correct answer

B: 4.6%

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Topic: Physical quantities and units, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2020 Paper 1 Variant 2, question 5.

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