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d₁ = 8 cm
d₂ = 4 cm = ½ d₁
v₁ = 2 m/s
P₁ = 10⁵ Pa
Dit: v₂, P₂
Jwb:
A₁ v₁ = A₂ v₂
¼ π d₁² v₁ = ¼ π d₂² v₂
d₁² v₁ = (½ d₁)² v₂
v₁ = 1/4 v₂
2 = 1/4 v₂
v₂ = 8 m/s
P = F/A
P ≈ 1/A
P₁/P₂ = A₂/A₁
P₁/P₂ = (¼ π d₂²) / (¼ π d₁²)
P₁/P₂ = (½ d₁)² / d₁²
P₁/P₂ = ¼
10⁵ Pa/P₂ = ¼
P₂ = 4 x 10⁵ Pa