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Fluid Mechanics: Terminal Velocity MCQ

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Terminal VelocityHardQuestion 30975

Question

A solid sphere falls through viscous oil and attains terminal velocity. When radius increases by 10%, terminal velocity increases by approximately:
  1. A
    10%
  2. B
    21%
    Correct
  3. C
    44%
  4. D
    100%

Correct answer

21%

Explanation

v_t ∝ r². If r → 1.1r, v_t → 1.21v_t. Increase = 21%.

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