A-LevelPhysicsForces, density and pressureFeb/Mar 2019Paper 1 Q141 Mark
An object shaped as a hemisphere rests with its flat surface on a table. The object has radius r and density ρ. The volume of a sphere is ⁴⁄₃ π r³. [Figure 14.1] Which average pressure does the object exert on the table?
A½ ρ r²
B½ ρ r² g
C⅔ ρ r
D⅔ ρ r g
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The correct answer is D. This question tests the candidate's understanding of forces, density and pressure within the Physicssyllabus. The examiner's mark scheme requires...
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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...
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