ConceptConceptDocsDocuments

Edexcel A-Level Physics Qualitative and Quantitative Uncertainty

Practise Edexcel A-Level Physics qualitative and quantitative uncertainties through limits, percentage differences and consistency judgements.

Syllabus
Pearson Edexcel International Advanced Subsidiary/Advanced Level
Course
Physics XPH11/YPH11
Level
AS

Exam points

  • calculate maximum and minimum values from stated angle or measurement uncertainty limits
  • compare percentage uncertainty with percentage difference to judge consistency or accuracy
  • explain qualitative uncertainty changes from wider peaks, resolution or measurement method

3.5.8 - Qualitative and quantitative uncertainties question 1

[Maximum number: 2]

A student determined a value for the acceleration of freefall g using the apparatus shown.

Figure for Question 3.5.8 - Qualitative and quantitative uncertainties question 1 — Edexcel A-Level Physics AS

In this investigation, the relationship between t and h is given by

1/t² = (g/3s²)h − R

where R is a constant.

1t2=(g3s2)h−R\frac{1}{t^{2}}=\left(\frac{g}{3 s^{2}}\right) h-R

where R is a constant.

where R is a constant.

The student determined the value of g as 9.56 m s−29.56 \mathrm{~m} \mathrm{~s}^{-2} with a percentage uncertainty of 4%.

Deduce whether the student's value of g is consistent with the accepted value.

All question bank results loaded