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IB Physics SL 6.5.3 Data quality Question Bank

Practise IB Physics SL/HL 6.5.3 by applying data quality concepts to exam-style physics questions.

Syllabus
First assessment 2025
Course
Physics SL
Level
SL

Exam points

  • identify the relevant physical quantity, model or diagram
  • apply the correct equation and units to the evidence
  • justify the result using conservation laws, fields or energy relationships

S2.2.3—Data quality question 1

[Maximum number: 1]

A group of students uses pressurized air to move a piston that forces a nail into a block of wood. A gauge is used to measure the pressure P of compressed air above atmospheric pressure. The nail enters the wood perpendicular to its surface.

Figure for Question S2.2.3—Data quality question 1 — IB Physics SL

The students use a ruler to measure the length of the nail which remains above the surface of the wood as shown. The depth of the nail inside the wood is d. All necessary length measurements are recorded using a ruler with uncertainty ±1 mm\pm 1 \mathrm{~mm}.

Figure for Question S2.2.3—Data quality question 1 — IB Physics SL

The students collect only one value of d for each value of P. Suggest why this is a poor method.

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