G=m·g=800kg · 10N/kg
G=8000N
F1/S1=F2/S2
=>F1=F2·S1/S2
G=F2=8000N
S1=_2,5cm)^2 · pi=6,25cm^2 · pi
S2=(10cm)^2 · pi=100cm^2 · pi
F1= (8000N · 6,25cm^2 · pi)/(100cm^2 · pi)
F1=80N ·6,25=500N
-------------------------------------------------------
p2=F2/S2
10cm=0,1m
S2=(0,1m)^2 · pi
S2=0,01m^2 · 3,14
p2=8000N/(0,01m^2 · 3,14)
p2=8000N/0,0314 m^2
p2=254.777,07006 N/m^2
p2=254.777,07006 Pa