A-LevelPhysicsPhysical quantities and unitsOct/Nov 2010Paper 1 Q21 Mark
The frictional force F on a sphere falling through a fluid is given by the formula F = 6πηv where a is the radius of the sphere, η is a constant relating to the fluid and v is the velocity of the sphere. What are the units of η?
Akg m s⁻¹
Bkg m⁻¹ s⁻¹
Ckg m s⁻³
Dkg m⁻³ s⁻³
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The correct answer is B. This question tests the candidate's understanding of physical quantities and units 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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