A-LevelPhysicsForces, density and pressureOct/Nov 2020Paper 1 Q151 Mark

A cylindrical block of ice of cross-sectional area 12 m² is floating, partially submerged, in the sea. The density of the sea water is 1020 kg m⁻³. A polar bear of mass 400 kg steps onto the block of ice. [Figure 15.1] The block of ice sinks a vertical distance d. What is the value of d?

Q: What is the correct answer to this A-Level Physics question?

The correct answer is B: 3.3 cm.

Q: What topic does this question test?

This question tests Forces, density and pressure in A-Level Physics (syllabus code 9702). It is worth 1 mark.

A3.3 mm

B3.3 cm

C0.32 m

D3.1 m

✓ Correct Answer

The correct answer is B: 3.3 cm

📋 Examiner Report & Trap Analysis

Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Physics Question

Topic

This multiple-choice question tests Forces, density and pressure in A-Level Physics (syllabus code 9702). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Physics Oct/Nov 2020 examination, Paper 1 Variant 2.

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