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A = 2 mm² = 2x10⁻⁶m²
l = 4m
m = 50 kg
g = 10m/s²
Dit: Tegangan kawat (σ)....?
σ = F/A
σ = mg/A
σ = (50x10)/2x10⁻⁶
σ = 500/2x10⁻⁶
σ = 250 x10⁶
σ = 25 x10⁷ N/m²