Jawaban:
1. Gaya keatas = berat diudara - berat di air
Fa = Wu - Wa
Fa = 75 - 50
Fa = 25 N
2. Massa jenis
Benda 1
ρ₁ = m₁/v₁ = 0,4/0,5 = 0,8 kg/m³
Benda 2
ρ₂ = m₂/v₂ = 0,5/1 = 0,5 kg/m³
Benda 3
ρ₃ = m₃/v₃ = 1/0,25 = 4 kg/m³
Massa jenis minyak ρₘ = 0,8 kg/m³ ( dalam soal salah satuan )
ρ₁ = ρₘ --> benda 1 melayang
ρ₂ < ρₘ --> benda 2 terapung
ρ₃ > ρₘ --> benda 3 tenggelam
3.
F₁/A₁ = F₂/A₂
F₁ = F₂. A₁/A₂
F₁= 840. 3/4
F₁ = 630 N
Gaya pd penghisap kecil 630 N
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Jawaban:
1. Gaya keatas = berat diudara - berat di air
Fa = Wu - Wa
Fa = 75 - 50
Fa = 25 N
2. Massa jenis
Benda 1
ρ₁ = m₁/v₁ = 0,4/0,5 = 0,8 kg/m³
Benda 2
ρ₂ = m₂/v₂ = 0,5/1 = 0,5 kg/m³
Benda 3
ρ₃ = m₃/v₃ = 1/0,25 = 4 kg/m³
Massa jenis minyak ρₘ = 0,8 kg/m³ ( dalam soal salah satuan )
ρ₁ = ρₘ --> benda 1 melayang
ρ₂ < ρₘ --> benda 2 terapung
ρ₃ > ρₘ --> benda 3 tenggelam
3.
F₁/A₁ = F₂/A₂
F₁ = F₂. A₁/A₂
F₁= 840. 3/4
F₁ = 630 N
Gaya pd penghisap kecil 630 N