In the low Reynolds number region, the drag force on a sphere is proportional to_______________?
Correct answer: A. V
- A. V
- B. V2
- C. V4
- D. V0.5
Explanation
At low Reynolds number, Stokes' law applies to a sphere: F_D = 3πμdV. With fluid viscosity and sphere size fixed, drag is therefore directly proportional to velocity V.
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