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m = 12 kg
g = 10m/s²
Alas balok (A) = 16cm x 10 cm = 160cm² x10⁻⁴ m²
A = 16 x10⁻³
Dit: P....?
P = F/A
P = mg/A
P = 12x10/16x10⁻³
P = 120/16x10⁻³
P = 7,5x10³
P = 7500 N/m²