In Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass varies as the ______________ of its diameter?
Correct answer: C. Square root
- A. Inverse
- B. Second power
- C. Square root
- D. First power
Explanation
In Newton’s-law flow, drag is proportional to d²v², while particle weight is proportional to d³. Equating them gives terminal velocity proportional to the square root of particle diameter.
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