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Verified answer
GayaF₁ = 60 N
F₂ = 40 N ... anggap searah
a = 0,25 = ¼ m/s² ... Anggap searah resultan gaya
m = ___?
Hukum II Newton
ΣF = m a
60 + 40 = m • ¼
a = 400 kg ✔️