AP EAMCET · PHYSICS · Mechanical Properties of Fluids
A spherical ball of radius \(1 \times 10^{-4} \mathrm{~m}\) and of density 104 \(\mathrm{kg} \mathrm{m}^{-3}\) falls freely under gravity through a distance ' \(h\) ' before entering a tank of water. After' entering water if the velocity of the ball does not change, then ' \(h\) ' is
- A 20.4 cm
- B 20.4 mm
- C 20.4 m
- D 10.2 m
Answer & Solution
Correct Answer
(C) 20.4 m
Step-by-step Solution
Detailed explanation
\(\mathrm{r}=1 \times 10^{-4} \mathrm{~m}, \sigma=10^4 \mathrm{~kg} \mathrm{~m}^{-3}\) Terminal speed, \(v=\frac{2}{9} \frac{\mathrm{gr}^2}{\eta}(\sigma-\delta)\)…
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