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Wa = 15 N
ρa = 1000 Kg/m³
g = 10 m/s²
ρb = ...............?
Penyelesaian :
* Mencari massa benda
Wu = 20 N
W = m x g
20 = m x 10
m = 2 Kg
* Mencari Volume benda
FA = ρa • g • V
Wu - Wa = ρa • g • V
20 - 15 = 1000 • 10 • V
5 = 10000 • V
V = 5/10000
V = 5 x 10⁻⁴ m³
* Mencari massa jenis benda
ρb = m/V
ρb = 2/5 x 10⁻⁴
ρb = 4000 Kg/m³
Jadi, massa jenis benda adalah 4000 Kg/m³