Question

The terminal velocity (v) of a sphere of radius r and specific weight W, which travels vertically downwards in a liquid of viscosity`mu` and specific weight W, is


Options:
A .  `V = (2r^3)/(9 mu) (W_s - W)`
B .  `V = (2r^2)/(9 mu) (W_s - W)`
C .  `V = 9(r^2)/(2 mu) (W_s - W)`
D .  `V = (3r^2)/(3 mu) (W_s - W)`
Answer: Option B


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