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m=2kg
s=0,4m²
p=?
g=10N/kg
p=F/S
F=m·g
p=m·g/S
p=2kg·10N/kg/0,4m²=20N/0,4m²=50Pa
Zad 2
P=40Pa
S=40cm²=40·(0,01m)²=40·0,0001m²=0,004m²
F=?
p=F/S
F=p·S=40Pa·0,004m²=0,16N