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v=75cm3 =0,000075m3 Fw=?
m=10kg Fg=?
g=10N/kg
d=1000kg/m3
Fg=m*g Fg=10kg*10N/kg Fg=100N
Fw=d*v*g Fw=0,000075m3*1000kg/m3*10N/kg Fw=0,75N
F=Fg-Fw F=100N-0,75N F= 99,25N