Page 43 - E-modul Fluida Statis Berorientasi Problem Based Learning
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4. Diketahui :
D = 1 cm = 0,01
-2
cm r = 0,5.10 m
3
ρf = 0,8 gr/cm = 800 kg/m 3
3
ρk = 2,6 gr/cm = 2600
3
kg/m η = 0,03 Pa s
2
g = 10 m/s
Ditanyakan :
V = ..?
Jawab :
2
2
v = (ρb – ρf)
9 η
2.(0,5.10 −2 2
)
= (2600 – 800)
9.0,03
900.10 −3
= (1800)
27.10 −2
0,5.10 −3
=
27.10 −2
10
=
3
= 3,33 m/s
