Two spherical bodies of (iron) and steel having same masses their ratio of radii are 1:4, what will the ratio of their terminal velocities:
Correct answer: B. 4:1
- A. 1:4
- B. 4:1
- C. 2:1
- D. 1:2
Explanation
For equal masses but different densities, radius affects terminal velocity through complex dependence; under typical assumptions Vt scales with r² for same fluid and similar density.
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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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