Home/
Competitive Exams/
NEET/
Physics/
Mechanical Properties of Fluids/
Question 6494
NEET Physics · Hard

Mechanical Properties of Fluids: Stokes' Law MCQ

Solve this quality-checked NEET multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
Stokes' LawHardQuestion 6494

Question

A ball (r=1 mm, ρ=2000 kg/m³) falls in oil (ρ_f=800, η=0.1 Pa·s, g=10). Terminal velocity:
  1. A
    0.235 m/s
  2. B
    0.0235 m/s
    Correct
  3. C
    2.35 m/s
  4. D
    0.00235 m/s

Correct answer

0.0235 m/s

Explanation

v_t = 2r²(ρ_s−ρ_f)g/9η = 2×10⁻⁶×1200×10/0.9 = 24000×10⁻⁶/0.9 ≈ 0.0267 m/s ≈ 0.0235 m/s (closest).

Review Mechanical Properties of Fluids notesStart timed chapter practice