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5). diketahui =
F₁ = 20 N
A₁ = 25 cm²
A₂ = 50 cm²
ditanya =
F₂ = ...
dijawab =
F₁ / A₁ = F₂ / A₂
F₂ = F₁ . A₂ / A₁
= 20 N . 50 cm² / 25 cm²
= 40 N (c)