2. а=0.4 м/с2 a=F/m
F=1.2Н m=F/a
m=? m=1.2/4.0=0.3кг
m=0.3кг
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2. а=0.4 м/с2 a=F/m
F=1.2Н m=F/a
m=? m=1.2/4.0=0.3кг
m=0.3кг