Terminal Velocity NEET Questions

Physics - Properties of Solids and Liquids

Terminal Velocity MCQ Questions


13.
Terminal velocity v_t depends on the square of the radius. If the radius is halved, the terminal velocity becomes:
A.
v_t/4
B.
v_t/8
C.
2v_t
D.
v_t/2
😑 View Answer Rough Work Error
ANSWER :
A. v_t/4
14.
Terminal velocity v_t is inversely proportional to viscosity η. In a more viscous fluid:
A.
Terminal velocity is unaffected
B.
Terminal velocity becomes infinite
C.
Terminal velocity is greater
D.
Terminal velocity is smaller because the fluid offers more resistance
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ANSWER :
D. Terminal velocity is smaller because the fluid offers more resistance
15.
Terminal velocity v_t is directly proportional to (ρ − σ). If the fluid density σ increases (approaching ρ), the terminal velocity:
A.
Becomes negative
B.
Increases
C.
Remains unchanged
D.
Decreases toward zero
😑 View Answer Rough Work Error
ANSWER :
D. Decreases toward zero
16.
Terminal velocity is directly proportional to g. On the Moon where g_moon = g/6, the terminal velocity of a raindrop in the same atmosphere would be:
A.
6 times greater than on Earth
B.
6 times smaller than on Earth
C.
√6 times smaller
D.
Same as on Earth
😑 View Answer Rough Work Error
ANSWER :
B. 6 times smaller than on Earth
17.
Two spheres of the same material (density ρ) but radii r and 3r fall through the same fluid (density σ, viscosity η). The ratio of their terminal velocities v₁ : v₂ is:
A.
9 : 1
B.
3 : 1
C.
1 : 3
D.
1 : 9
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ANSWER :
D. 1 : 9
18.
Two spheres of the same radius a but densities ρ₁ = 8000 kg/m³ and ρ₂ = 2000 kg/m³ fall through water (σ = 1000 kg/m³). The ratio of their terminal velocities v₁ : v₂ is:
A.
2 : 1
B.
7 : 1
C.
8 : 2
D.
4 : 1
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ANSWER :
B. 7 : 1