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Verified answer
F₁ = 80 N, ke kanan
F₂ = 60 N, ke kiri
S = 0,5 m, ke kanan
W = ___?
usaha total
W = ΣF • S
W = (F₁ - F₂) • S
W = (80 - 60) • 0,5
W = 20 • 0,5
W = 10 J ✓