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General
Easy
Question
A spherical ball of density r and radius 0.003m is dropped into a tube containing a viscous fluid filled up to the 0 cm mark as shown in the figure. Viscosity of the fluid = 1.260 Nm–2 and its density rL= r/2 = 1260 kgm–3. Assume the ball reaches a terminal speed by the 10 cm mark. The time taken by the ball to traverse the distance between the 10 cm and 20 cm mark is (g = acceleration due to gravity = 10 ms–2)
- 500
s
- 50 ms
- 0.5 s
- 5 s
s
The correct answer is: 5 s
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