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m-masa
g-przyspieszenie ziemskie (10m/s²)
a) m=4t=4000kg
F=4000kg×10m/s²
F=40000N
b) m=20g=0,02kg
F=0,02kg×10m/s²
F=0,2N
m=4tony=4000kg
g=10n/kg
fg=m*g
fg=4000*10
fg=40000N
krolik
m=20g=0,02kg
g=10n/kg
fg=0,02*10
fg=0,2N