Jawabanmu

2014-04-27T18:55:28+07:00
ΣF = 0 

mg - F archimedes - f = 0 

(ρ air) g (4/3)πr³ - (ρ udara) g (4/3)πr³ - 6π r v η = 0 

(1000)(10)(4/3)(0.2/1000)³ - (1.3) (10)(4/3)(0.2/1000)³ - 6 (0.2/1000) v (2 * 10^-5) = 0 

v = 4.44 m/s <---

Semoga membantu :)