tolong di jawab y thx

Usaha dan Energi
Kelas X

F₁ = 20 N [ke kanan]
F₂ = - 5 N [ke kiri]
s = 4 m [ke kanan]

a. W₁ = F₁ • s
W₁ = 20 • 4 = 80 J

W₂ = F₂ • s
W₂ = 5 • 0 = 0 J

b. W = [tex] \sum{F} [/tex] • s
W = (20 - 5) • 4
W = 15 • 4 = 60 J

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