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r = 2mm -> 2x10^-3m
P minyak = 965kg/m3
P baja = 8100 kg/m3
η = 1,2 kg/ms
g = 10m/s^2
Ditanya
kecepatan maks V ..??
2 r².g
V = -------- (Pb-Pm)
9 η
2.(2x10^-3)².10
V= ------------------------------(8100-965)
9 . 1,2
20 . 4x10^-6
V=------------------------ (7135)
10,8
V = 7,4x10^-6 (7135)
V = 0,05m/s
=2 x 10 x 0,002² (8100-965) / 9 x 1,2
=0,00008 (7135)/9 x 1,2
=0,5708/10,8
=0,052 m/s
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