A-LevelPhysicsPhysical quantities and units9702/12 · Oct/Nov 2009 · Q11 Mark

The drag force F acting on a moving sphere obeys an equation of the form F = kAv², where A represents the sphere's frontal area and v represents its speed. What are the base units of the constant k?

Akg m s⁻⁴

Bkg m⁻² s⁻¹

Ckg m⁻³

Dkg m⁻⁴ s²

✓ Correct answer

C: kg m⁻³

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Topic: Physical quantities and units, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2009 Paper 1 Variant 2, question 1.

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