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Question 18M.3.SL.TZ2.a

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Date May 2018 Marks available [Maximum mark: 2] Reference code 18M.3.SL.TZ2.a
Level SL Paper 3 Time zone TZ2
Command term Determine, Estimate Question number a Adapted from N/A
a.
[Maximum mark: 2]
18M.3.SL.TZ2.a

To determine the acceleration due to gravity, a small metal sphere is dropped from rest and the time it takes to fall through a known distance and open a trapdoor is measured.

M18/4/PHYSI/SP3/ENG/TZ2/01

The following data are available.

Diameter of metal sphere = 12.0 ± 0.1  mm Distance between the point of release and the trapdoor = 654 ± 2  mm Measured time for fall = 0.363 ± 0.002  s

Determine the distance fallen, in m, by the centre of mass of the sphere including an estimate of the absolute uncertainty in your answer.

[2]

Markscheme

distance fallen = 654 – 12 = 642 «mm»

absolute uncertainty = 2 + 0.1 «mm» ≈ 2 × 10–3 «m» or = 2.1 × 10–3 «m» or 2.0 × 10–3 «m»

 

Accept answers in mm or m

[2 marks] 

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