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If the terminal speed of a sphere of gold (density = 19.5 kg/m 3 ) is 0.2 m/s in a viscous liquid (density = 1.5 kg/m 3 ), find the terminal speed of a sphere of silver (density = 10.5 kg/m 3 ) of the same size in the same liquid (a) 0.4m/s (b) 0.133m/s (c) 0.1 m/s (d) 0.2 m/s

 If the terminal speed of a sphere of gold (density = 19.5 kg/m3) is 0.2 m/s in a viscous liquid (density = 1.5 kg/m3), find the terminal speed of a sphere of silver (density = 10.5 kg/m3) of the  same size in the same liquid
(a) 0.4m/s
(b) 0.133m/s
(c) 0.1 m/s
(d) 0.2 m/s

Grade:12th pass

1 Answers

Aditi Chauhan
askIITians Faculty 396 Points
9 years ago

(c) Terminal velocity, vT = 2r2(d1 – d2 )g

vT2/0.2 = (10.5 – 1.5)/(19.5 – 1.5) ? vT­2 = 0.2 * 9/18 = 0.1 m/s

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