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A = 40 cm² = 40/10000 = 4/1000 m²
F = 300 N
Dit :
a. p 1 kaki
b. p 2 kaki
Jwb :
p 1 kaki = F/A
= 300/(4/1000)
= 300 × 1000/4
= 75 × 1000
= 75.000 Nm² atau 75.000 Pa
p 2 kaki = 2(p 1 kaki)
= 2(75.000)
= 150.000 Nm² atau 150.000 Pa