A big rain drop having terminal velocity of 32 m/sec is divided into eight equal rain drops terminal velocity of each small drop will be:
Correct answer: C. 8 m/s
- A. 32 m/s
- B. 16 m/s
- C. 8 m/s
- D. 64 m/s
Explanation
Splitting into 8 reduces each small drop's radius to r/2 (since volume ∝ r³). If Vt ∝ r², then new V = Voriginal × (1/2)² = V/4 = 32/4 = 8 m/s.
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Fluid flow is described through speed, pressure and density, including steady flow and the equation of continuity for conserving mass. Bernoulli's equation relates pressure, speed and height, while fluid drag and terminal velocity explain why a falling object eventually moves at constant speed when drag balances its weight.
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