A-LevelPhysicsForces, density and pressure9702/12 · May/June 2025 · Q161 Mark

A block is submerged vertically in a liquid. The four diagrams show the block viewed from the side. Which diagram shows, to scale, the forces exerted on equal areas of the block by the liquid?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

ADiagram A shows perpendicular forces increasing with depth on vertical sides and uniform forces on horizontal sides.

BDiagram B shows uniform perpendicular forces on vertical sides.

CDiagram C shows forces not perpendicular to the surfaces.

DDiagram D shows perpendicular forces but not scaled correctly.

✓ Correct answer

A: Diagram A shows perpendicular forces increasing with depth on vertical sides and uniform forces on horizontal sides.

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Topic: Forces, density and pressure, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2025 Paper 1 Variant 2, question 16.

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