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Edexcel A-Level Physics A2 Areas and Volumes

Edexcel A-Level Physics A2 Areas and Volumes
Pearson Edexcel International Advanced Subsidiary/Advanced Level in Physics, Issue 3, July 2021Physics XPH11/YPH11

Review areas and volumes in Edexcel A-Level Physics through cross-sectional area, coin volume, cylindrical geometry and unit-converted dimensions.

How this is tested

  • calculate cross-sectional area from radius or diameter before using the value in a physics result
  • combine averaged diameter or thickness measurements to find the volume of a small object

Question 4(b)(i)

[Maximum number: 2]

A student made measurements of the plastic protractor shown.

Figure for Question 4(b)(i) — Edexcel A-Level Physics A2

The student determined the volume V of the plastic protractor from the measurements shown.

Figure for Question 4(b)(i) — Edexcel A-Level Physics A2

The student recorded the following measurements.
D=10.10 cm±0.05 cmD=10.10 \mathrm{~cm} \pm 0.05 \mathrm{~cm}x=4.5 mm±0.1 mmx=4.5 \mathrm{~mm} \pm 0.1 \mathrm{~mm}t=1.40 mm±0.02 mmt=1.40 \mathrm{~mm} \pm 0.02 \mathrm{~mm}

Show that V is about 6.2 cm36.2 \mathrm{~cm}^{3}.