nomor 11. jawab+caranya. makasih

USAHA dan ENERGI

F₁ = 30 N. α₁ = 37°
F₂ = 50 N. α₂ = 60°
S = 25 m
W = __?

W = ΣF S
W = (F₁ cos α₁ + F₂ cos α₂) S
W = (30 cos 37° + 50 cos 60°) • 25
W = (30 • 4/5 + 50 • ½) • 25
W = (24 + 25) • 25
W = 49 • 25
W = 1225 J ← jwb